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Dynamic evolution of copper-based catalysts during CO2 electroreduction 认领 引用 被引量：2
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作者 Zhizheng Wu Pengpeng Yang Minrui Gao 《Nano Materials Science》 EI CAS CSCD 2026年第3期687-702,共16页
The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic cat... The CO2 electroreduction reaction(CO2RR)is a promising approach of using renewable electricity to synthesize fuels and value-added chemicals.At present,Cu is generally considered to be the major monometallic catalyst capable of producing multicarbon products(C2+)with high current densities from the CO2RR,but it still suffers from the low activity and high overpotential.The challenge of sluggish CO2RR kinetics can be overcome by developing efficient Cu-based catalysts,which undergo the dynamic evolution during the reaction process.The dynamic evolution of the Cu-based catalysts taking place under working conditions makes it difficult to study the structure-activity correlation and reaction mechanism present during CO2RR.Recently,a number of important works have observed and revealed the dynamic evolution process of Cu-based catalysts by operando characterization techniques.This aspect,however,remains less summarized and prospected in the CO2RR literature.In this Review,we summarize the dynamic evolution of Cu-based catalysts during the CO2RR from aspects of structure,composition and oxidation state.We highlight the correlations between evolution behaviors and catalytic properties.Then,we discuss the dynamic deactivation process of Cu-based catalysts during CO2RR,including metal impurities contamination and carbon accumulation.In particular,we introduce recent advancements in in situ characterization techniques those are employed to probe the dynamic evolution under operating conditions.We end the Review by outlining the challenges and offering personal perspectives on the future development opportunities in this field. 展开更多
关键词 Copper-based catalysts CO2electroreduction reaction Dynamic evolution
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Dynamic evolution of residual oil during long-term waterflooding in Middle East carbonate reservoirs:A pore-scale investigation 认领 引用
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作者 Kai-Jun Tong Yue Pan +5 位作者 Sheng Guo Xiao-Cong Lyu Han Chen Hui-Qing Liu Zhi-Xue Sun Jia-Wei Tang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第3期1428-1444,共17页
Long-term water flooding(LTWF)is an efficient way to improve oil recovery(EOR)in carbonate reservoirs in the Middle East.Due to the complex depositional environment and intricate pore-throat structures of carbonate re... Long-term water flooding(LTWF)is an efficient way to improve oil recovery(EOR)in carbonate reservoirs in the Middle East.Due to the complex depositional environment and intricate pore-throat structures of carbonate reservoirs,the development characteristics differ significantly from those of conventional sandstone reservoirs.While the mechanisms of LTWF in carbonate reservoirs are well-documented,there remains a significant gap in understanding the microscopic pore-scale displacement characteristics and the dynamic evolution of residual oil.To address this,nuclear magnetic resonance(NMR)and computed tomography(CT)scanning techniques were employed to investigate the behavior of LTWF across various carbonate rock samples.Initially,NMR technology was utilized to elucidate the pore-throat displacement characteristics at the microscopic level for different core samples under LTWF.Subsequently,CT scanning was applied to explore the dynamic evolution of microscopic residual oil and to categorize the types of residual oil based on their formation mechanisms.We found that LTWF predominantly utilizes oil within microscale pores of 1–10μm and>10μm.As the volumes of injected water increase,there is a noticeable improvement in oil displacement within submicron pores(0.1–1μm).However,residual oil primarily accumulates in nanopores(<0.1μm)and submicron pores.The study identified five distinct types of microscopic residual oil:clustered,throat,droplet,corner adsorbed,and pore lining.Notably,the transformation of residual oil in dolomite cores generally shifts from clustered to throat forms,while in limestone cores,it transitions from clustered to predominantly corner adsorbed and pore lining configurations.This nuanced understanding of oil utilization and residual categories under LTWF offers valuable insights into optimizing EOR strategies in complex carbonate reservoirs. 展开更多
关键词 Long-term water flooding(LTWF) Microscopic pore-throat displacement characteristics Residual oil dynamic evolution Carbonate reservoir
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Dynamic Evolution of Copper-Based Catalysts in Electrochemical Nitrate Reduction to Ammonia 认领 引用
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作者 Yabo Wang Gangfeng Du +3 位作者 Zhengshan Tian Zihong Pan Kesheng Cao Haoqi Wang 《化学进展》 SCIE CAS CSCD 北大核心 2026年第5期809-831,共23页
The dynamic evolution of catalysts is a crucial phenomenon in electrocatalysis,particularly in the nitrate electroreduction to ammonia(NO3RR)process.This review systematically studies the mechanisms underlying the ... The dynamic evolution of catalysts is a crucial phenomenon in electrocatalysis,particularly in the nitrate electroreduction to ammonia(NO3RR)process.This review systematically studies the mechanisms underlying the dynamic evolution of copper-based catalysts during NO3RR,emphasizing how reconstructed structures can significantly influence electrochemical performance.Achieving a designed active surface through dynamic evolution is essential for optimizing catalytic efficiency.We highlight advanced electrochemical,microscopic,and spectroscopic techniques that are instrumental in tracking these dynamic processes,providing insights into how structural changes occur in real-time.Moreover,we present a comprehensive summary of the latest strategies for regulating dynamic evolution,including valence-state control,morphological engineering,crystal facet optimization,heterogeneous interface construction,and in-situ defect engineering.These approaches effectively harness the dynamic nature of catalysts to enhance their performance in NO3RR.However,several challenges remain,such as the mechanistic ambiguity surrounding active sites,limited capabilities for in-situ monitoring,trade-offs between stability and activity,and scalability barriers.This review concludes by offering perspectives for future research,asserting that controlled dynamic evolution is pivotal for unlocking the full potential of Cu-based catalysts in the pursuit of sustainable nitrate reduction to ammonia. 展开更多
关键词 dynamic evolution nitrate reduction electrocatalysis copper catalysts
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Experimental Study on the Desiccation Cracking Dynamic Evolution Law of Fine-Grained Coral Soil 认领 引用
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作者 FANG Hua-qiang DING Xuan-ming +4 位作者 LUO Zhao-gang JIANG Chun-yong LI Yi-fu WANG Hong REN Jun-yu 《China Ocean Engineering》 SCIE EI CSCD 2025年第4期728-743,共16页
Coralline soils,specialized materials found extensively in the South China Sea,are playing an increasingly vital role in engineering projects.However,like most terrigenous soils,fine-grained coral soil is prone to shr... Coralline soils,specialized materials found extensively in the South China Sea,are playing an increasingly vital role in engineering projects.However,like most terrigenous soils,fine-grained coral soil is prone to shrinkage and cracking,which can significantly affect its engineering properties and ultimately jeopardize engineering safety.This paper presents a desiccation cracking test of fine-grained coral soil,with a particular focus on the thickness effect.The study involved measuring the water content and recording the evolution of desiccation cracking.Advanced image processing technology is employed to analyze the variations in crack parameters,clod parameters,fractal dimensions,frequency distributions,and desiccation cracking propagation velocities of fine-grained coral soil.Furthermore,the dynamic evolution of desiccation cracking under the influence of layer thickness is analyzed.A comprehensive crack evolution model is proposed,encompassing both top-down and bottom-up crack propagation,as well as internal tensile cracking.This work introduces novel metrics for the propagation velocity of the total crack area,the characteristic propagation velocities of desiccation cracks,and the acceleration of crack propagation.Through data fitting,theoretical formulas for soil water evaporation,propagation velocities of desiccation cracks,and crack propagation acceleration are derived,laying a foundation for future soil cracking theories. 展开更多
关键词 fine-grained coral soil desiccation crack layer thickness crack dynamic evolution crack propagation acceleration
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Atomistic insights into dynamic evolution of solid electrolyte interface 认领 引用
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作者 Yilin Chen Yuxin Fan +4 位作者 Yongqing Gong Chenlong Gao Yunhui Huang Wei Luo Menghao Yang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第12期401-411,I0012,共11页
Lithium-ion batteries are at the forefront of modern energy storage technology.However,the accumulation of by-products such as ethylene and carbon dioxide during charging and discharging cycles reduces battery effecti... Lithium-ion batteries are at the forefront of modern energy storage technology.However,the accumulation of by-products such as ethylene and carbon dioxide during charging and discharging cycles reduces battery effective capacity and threatens large-scale safe performance.With significant advantages over ethylene carbonate(EC)electrolytes,fluorinated electrolytes can more effectively suppress internal gas evolution,thereby improving battery safety and cycling stability.To reveal the mechanism behind gas formation in lithium-ion batteries,our study investigated the transport behavior and interfacial products of fluorinated electrolytes under various operation conditions,including electrode material and electrolyte composition.Innovatively,we applied the reaction network integrator ReacNetGenerator to the analysis of the solid electrolyte interface(SEI)in lithium batteries,providing more molecular fingerprint information from the perspective of specific products.Using reactive molecular dynamics(MD)simulations with the ReaxFF force field and EChemDID,complemented by density functional theory(DFT)calculations,our results demonstrate that fluorinated electrolytes can effectively suppress the decomposition of LiPF6 to produce toxic gases PFs and PF_3.DFT analysis further reveals that highly fluorinated solvents(e.g.,FEMC)enhance the anti-reduction stability of PF6~-through synergistic regulation of molecular orbital energy levels,thermodynamic electron affinity,charge transfer,and electrostatic potential distribution,thereby mitigating LiPF6 decomposition.Additionally,fluorinated electrolytes generate significantly more LiF components than non-fluorinated ones to promote the formation of a stable and durable solid electrolyte interface(SEI).Experimental validations via XPS and GC-MS confirm reduced CO2 generation and LiF-enriched SEI formation,aligning with simulation and DFT data.The findings provide valuable insights for the design of advanced electrolytes aimed at ensuring large-scale,safe energy storage solutions. 展开更多
关键词 Atomistic insights into dynamic evolution of solid electrolyte interface
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Dynamic evolution of shear rate-dependent behavior of rock discontinuity under shearing condition 认领 引用 被引量：8
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作者 GU Lin-lin WANG Zhen +2 位作者 ZHANG Feng GAO Fei WANG Xiao 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第6期1875-1887,共13页
Rock blocks sliding along discontinuities can cause serious disasters,such as landslides,earthquakes,or rock bursts.The shear rate-dependent behavior is a typical time-dependent behavior of a rock discontinuity,and it... Rock blocks sliding along discontinuities can cause serious disasters,such as landslides,earthquakes,or rock bursts.The shear rate-dependent behavior is a typical time-dependent behavior of a rock discontinuity,and it is closely related to the stability of a rock block.To further study the shear rate-dependent behavior of rock discontinuities,shear tests with alternating shear rates(SASRs)were conducted on rock discontinuities with various surface morphologies.The dynamic evolution of the shear rate dependency was studied in detail based on the shear test results,and three stages were identified with respect to the shear stress and shear deformation states.The test results revealed that dynamic changes in shear stiffness and the energy storage abilities of the rock discontinuities occurred in relation to the shear rate-dependent behavior of crack growth,which increased with an increase in normal stress and/or the joint roughness coefficient.The stage of decreasing shear stiffness corresponded to a stage of noticeable shear rate-dependency,and the shear rate was found to have no influence on the initial crack stress. 展开更多
关键词 shear rate-dependent behavior rock discontinuity dynamic evolution initial crack stress
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Dynamic evolution trend of comprehensive transportation green efficiency in China:From a spatio-temporal interaction perspective 认领 引用 被引量：3
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作者 MA Qifei JIA Peng +1 位作者 SUN Caizhi KUANG Haibo 《Journal of Geographical Sciences》 SCIE CSCD 2022年第3期477-498,共22页
It is urgent and important to explore the dynamic evolution in comprehensive transportation green efficiency(CTGE)in the context of green development.We constructed a social development index that reflects the social ... It is urgent and important to explore the dynamic evolution in comprehensive transportation green efficiency(CTGE)in the context of green development.We constructed a social development index that reflects the social benefits of transportation services,and incorporated it into the comprehensive transportation efficiency evaluation framework as an expected output.Based on the panel data of 30 regions in China from 2003-2018,the CTGE in China was measured using the slacks-based measure-data envelopment analysis(SBM-DEA)model.Further,the dynamic evolution trends of CTGE were determined using the spatial Markov model and exploratory spatio-temporal data analysis(ESTDA)technique from a spatio-temporal perspective.The results showed that the CTGE shows a U-shaped change trend but with an overall low level and significant regional differences.The state transition of CTGE has a strong spatial dependence,and there exists the phenomenon of“club convergence”.Neighbourhood background has a significant impact on the CTGE transition types,and the spatial spillover effect is pronounced.The CTGE has an obvious positive correlation and spatial agglomeration characteristics.The geometric characteristics of the LISA time path show that the evolution process of local spatial structure and local spatial dependence of China’s CTGE is stable,but the integration of spatial evolution is weak.The spatio-temporal transition results of LISA indicate that the CTGE has obvious transfer inertness and has certain path-dependence and spatial locking characteristics,which will become the major difficulty in improving the CTGE. 展开更多
关键词 comprehensive transportation green efficiency spatio-temporal interaction dynamic evolution trend spatial markov model exploratory spatio-temporal data analysis
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Regional difference and dynamic evolution of development quality of power industry in China 认领 引用 被引量：1
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作者 Sha Yu Yongjian Pu +2 位作者 Lefeng Shi Hao Yu Yixiang Huang 《Chinese Journal of Population,Resources and Environment》 2023年第1期1-12,共12页
To achieve the goals of carbon peaking and carbon neutrality and maintain high-quality economic growth,China is currently striving to improve the quality of development of its power sector.In this regard,revealing the... To achieve the goals of carbon peaking and carbon neutrality and maintain high-quality economic growth,China is currently striving to improve the quality of development of its power sector.In this regard,revealing the regional differences and evolutionary trends in the development quality of China’power sector has a high value to inspire the next improvement direction toward how to integrate regional power recourses to an overall optimization level.Motived by this purpose,this paper uses the entropy method to evaluate the com‐prehensive and subsystem indices of the development quality of the power industry,and reveals their re‐gional differences and evolutionary trends with the help of the Dagum Gini coefficient and Kernel density es‐timation methods.The findings show that:There are obvious regional differences in the development quality of China’s power industry,and the differences are steadily declining in all regions except the West.Regional differences are mainly derived from inter-regional differences,with the largest inter-regional differences in the East-Northeast region.Intra-regional differences show a distribution pattern of East>West>North‐east>Center. 展开更多
关键词 Development quality of power industry Regional difference The Dagum Gini Dynamic evolution Kernel density
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Dynamic evolution patterns of the degree of ground resistivity anisotropy and the sets mogenic process 认领 引用 被引量：5
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作者 毛桐恩 胥广银 +2 位作者 范思源 赵明 孙景芳 《Acta Seismologica Sinica(English Edition)》 1999年第2期200-205,共6页
Following a new train of thinking, this paper has explored first the potential information in the ground resistivitydata observed by the existing geoelectric observation system, investigated and proposed a new dimensi... Following a new train of thinking, this paper has explored first the potential information in the ground resistivitydata observed by the existing geoelectric observation system, investigated and proposed a new dimensionlessgeoelectric precursor factor, the degree of ground resistivity anisotropy, S, and studied the characteristics of dynamic evolution pattern of S during the seismogenic process. The results show that, during the seismogenic process, the degree of ground resistivity anisotropy (S) displays h process of 'normal' → 'abnormal strengthening(amplitude, range)' → 'abnormal weakening'→ 'earthquake occurrence'→ 'normal'. The earthquake wouldoccur at the time when the S value has entered the late stage of strengthening and turns to weaken and in the gradient belt on the margin ofS anomaly region. The dynamic evolution pattern ofS reflects the changes of the tectonicstress field during the seismogenic process. Therefore, it would be possible to trace the process of earthquake generation and occurrence from the dynamic evolution pattern ofS so as to service eaJ'thquake prediction. 展开更多
关键词 degree of ground resistivity anisotropy dynamic evolution pattern seismogenic process
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Collaboration strategy for software dynamic evolution of multi-agent system 认领 引用
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作者 李青山 褚华 +2 位作者 张曼 李敏 刁亮 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2629-2637,共9页
As the ability of a single agent is limited while information and resources in multi-agent systems are distributed, cooperation is necessary for agents to accomplish a complex task. In the open and changeable environm... As the ability of a single agent is limited while information and resources in multi-agent systems are distributed, cooperation is necessary for agents to accomplish a complex task. In the open and changeable environment on the Internet, it is of great significance to research a system flexible and capable in dynamic evolution that can find a collaboration method for agents which can be used in dynamic evolution process. With such a method, agents accomplish tasks for an overall target and at the same time, the collaborative relationship of agents can be adjusted with the change of environment. A method of task decomposition and collaboration of agents by improved contract net protocol is introduced. Finally, analysis on the result of the experiments is performed to verify the improved contract net protocol can greatly increase the efficiency of communication and collaboration in multi-agent system. 展开更多
关键词 multi-agent system dynamic evolution task decomposition collaboration
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Features and physical proces of the dynamic evolution pattern of ground resistivity precursor front 认领 引用
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作者 毛桐恩 范思源 +1 位作者 余素荣 孙景芳 《Acta Seismologica Sinica(English Edition)》 1998年第5期72-79,共8页
In order to quantitatively describe the geoelectric precursor anomaly in the short-impending process of earthquakes, a new geoelectric precursor index — (monthly) relative change rate of ground resistivity, R ρ (t) ... In order to quantitatively describe the geoelectric precursor anomaly in the short-impending process of earthquakes, a new geoelectric precursor index — (monthly) relative change rate of ground resistivity, R ρ (t) , is designed. Using this index and choosing the internationally accepted ground resistivity data before the Tangshan M =7.8 earthquake of July 28, 1976, the features of dynamic evolution pattern of R ρ(t) are studied. The results show that: ① about 10～9 months before earthquake, the ground resistivity in a certain range around the epicentral region begins to display the anomaly of accelerating descent, and the rate of descent is higher in the epicentral region than in surrounding areas; ② with the shortening of countdown before earthquake, the R ρ(t) value in epicentral region increases gradually (ground resistivity value decreases at an increasing rate); ③ the R ρ(t) value has the epicentral area as a center and its contour lines propagate towards surrounding areas with the shortening of countdown before earthquake; ④after the R ρ(t) value in epicentral region has descended at increasing rate to reach an extremity [ R ρ(t) = (7.0], it turns to descend at decreasing rate (2～3 months) and earthquake occurs when it accelerates again. Meanwhile, earthquake occurs when the contour lines of R ρ(t) stop propagating towards surrounding areas and turn to shrink back (2～3 months later). Its physical process can be explained by the″ swollen hypothesis″ of Prof. Fu and the theory of ″Slip-weakening and rockmass instability″ of Mei, Niu, et al .. 展开更多
关键词 short-impending process of earthquake ground resistivity precursor front dynamic evolution physical process
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Dynamic evolution mechanism of the fracturing fracture system——Enlightenments from hydraulic fracturing physical experiments and finite element numerical simulation 认领 引用
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作者 Qi-Qiang Ren Li-Fei Li +3 位作者 Jin Wang Rong-Tao Jiang Meng-Ping Li Jian-Wei Feng 《Petroleum Science》 SCIE EI CAS CSCD 2024年第6期3839-3866,共28页
This study aims to elucidate the dynamic evolution mechanism of the fracturing fracture system during the exploration and development of complex oil and gas reservoirs.By integrating methods of rock mechanical testing... This study aims to elucidate the dynamic evolution mechanism of the fracturing fracture system during the exploration and development of complex oil and gas reservoirs.By integrating methods of rock mechanical testing,logging calculation,and seismic inversion technology,we obtained the current insitu stress characteristics of a single well and rock mechanical parameters.Simultaneously,significant controlling factors of rock mechanical properties were analyzed.Subsequently,by coupling hydraulic fracturing physical experiments with finite element numerical simulation,three different fracturing models were configured:single-cluster,double-cluster,and triple-cluster perforations.Combined with acoustic emission technology,the fracture initiation mode and evolution characteristics during the loading process were determined.The results indicate the following findings:(1)The extension direction and length of the fracture are significantly controlled by the direction of the maximum horizontal principal stress.(2)Areas with poor cementation and compactness exhibit complex fracture morphology,prone to generating network fractures.(3)The interlayer development of fracturing fractures is controlled by the strata occurrence.(4)Increasing the displacement of fracturing fluid enlarges the fracturing fracture length and height.This research provides theoretical support and effective guidance for hydraulic fracturing design in tight oil and gas reservoirs. 展开更多
关键词 Rockmechanical parameters Petrophysical experiments Hydraulic fracturing physical experiment Finite element numerical simulation Dynamic evolution mechanism Fracturing fracture
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A Dynamic Evolution Model of Airline Networks 认领 引用
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作者 谢泽浚 张璐嫚 +1 位作者 邓盛锋 李炜 《Chinese Physics Letters》 SCIE EI CAS CSCD 2017年第5期137-140,共4页
Empirical data show that most of the degree distribution of airline networks assume a double power law. In this work, firstly, we assume cities as sites, flight between two cities as an edge between two sites, and bui... Empirical data show that most of the degree distribution of airline networks assume a double power law. In this work, firstly, we assume cities as sites, flight between two cities as an edge between two sites, and build a dynamic evolution model for airline networks by improving the BA model, in which the conception of attractiveness plays a decisive role in the course of evolution of the networks. To this end, we discuss whether the attractiveness depends on the site label s or not separately, finally we obtain analytic degree distribution. As a result, if the attractiveness of a site is independent of the degree distribution of sites, which will follow the double power law, otherwise, it will be scale-free. Moreover, degree distribution depends on the parameters of the models, and some parameters aye more sensitive than others. 展开更多
关键词 A Dynamic Evolution Model of Airline Networks As
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Coupled FEM-DEM modeling of permeability evolution in rough fractured shale during shearing under varying confining pressures 认领 引用 被引量：2
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作者 Bin Li Qi Li 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第3期1736-1754,共19页
The dynamic evolution of fracture permeability presents a critical scientific challenge in rock masses.Understanding the mechanisms of rock mass permeability evolution is vital for engineering project design and opera... The dynamic evolution of fracture permeability presents a critical scientific challenge in rock masses.Understanding the mechanisms of rock mass permeability evolution is vital for engineering project design and operations.By integrating the discrete element method(DEM)with the finite element method(FEM),a numerical simulation framework for shear seepage in rough fractured shale has been developed to investigate the dynamic mechanisms of permeability evolution under varying confining pressures and during the shearing process.Numerical simulations were conducted on rough fractured samples under effective confining pressures ranging from 5 MPa to 20 MPa to monitor the aperture and permeability evolution of the fracture.The results of the numerical simulation are consistent with the experimental observations,indicating that both the shearing process and confining pressure significantly influence permeability.Moreover,the magnitude of the confining pressure is a crucial factor influencing the trend in permeability changes.Under a confining pressure of 5 MPa,fracture permeability initially increases significantly but decreases post-shearing.In contrast,a continuous decrease in fracture permeability is observed when the confining pressure exceeds 10 MPa.The results of the shear numerical simulation indicate that the confining pressure restricts fracture dilation during shearing,promotes the generation of rock debris,and decreases both the permeability and transmissivity of the fracture.The wear results obtained from numerical simulations are consistent with the experimental patterns and correlate with the joint roughness coefficient(JRC).This study proposed an effective numerical simulation method to reveal the evolution mechanism of fracture flow capacity,taking into account the wear of the fracture surface in shear simulations and the initial stress state of the rock in seepage simulations.This research explains the permeability evolution mechanism of fractured shale from a microscopic perspective,and the proposed numerical simulation method for shear seepage provides a powerful means to uncover the dynamic evolution mechanisms governing fracture permeability. 展开更多
关键词 Discrete element method(DEM) Finite element method(FEM) Fracture Permeability Shear stress Joint roughness coefficient(JRC) Dynamic evolution
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Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution 认领 引用 被引量：1
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作者 Yuanlin Fu Xiaoting Yang +8 位作者 Ya Yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen Fuqiang Fan Yuhang Li Yu Fu 《Nano Research》 SCIE EI CSCD 2025年第1期164-172,共9页
The electrochemical nitrate reduction reaction(eNO3-RR)is considered an effective approach for converting nitrate-containing wastewater to ammonia.The adsorption and activation of NO3-is the critical step ... The electrochemical nitrate reduction reaction(eNO3-RR)is considered an effective approach for converting nitrate-containing wastewater to ammonia.The adsorption and activation of NO3-is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction reaction.The Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO3-and the resulting Co2+is then reduced by electroreduction to Co0,which circulates continuously.This resulted in overcoming the energy input required for NO3-adsorption and conversion,thereby increasing the catalytic activity.At the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better properties.The obtained Co(OH)2@Co-N-C has an excellent eNO3-RR of 2774.7μg·h-1·cm-2with a Faraday efficiency of 81.4%in neutral solution.At the same time,the material-modified electrode can run stably for more than 100 h.Our work provides a new idea for the design of Co-based catalysts for eNO3-RR. 展开更多
关键词 electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction
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Regional Differences,Dynamic Evolution,and Obstacle Factors in the Development of Agricultural New Quality Productive Forces in China 认领 引用 被引量：1
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作者 QIN Lingui LIU Songqi +2 位作者 WANG Wanzhi MIAO Fengsheng XIE Fengjie 《Journal of Resources and Ecology》 CSCD 2025年第5期1499-1514,共16页
Agricultural new quality productive forces are the key foundation for realizing high-quality agricultural development.This study constructs the evaluation indicator system of agricultural new quality productive forces... Agricultural new quality productive forces are the key foundation for realizing high-quality agricultural development.This study constructs the evaluation indicator system of agricultural new quality productive forces(ANQPFs)from three dimensions:agricultural laborers,agricultural labor objects,and agricultural labor resources.The equal weight method,entropy method,and CRITIC method are comprehensively applied to measure ANQPFs in China from 2011 to 2021.The Dagum's Gini coefficient,variance decomposition,kernel density estimation,Markov chain,and obstacle degree model are used to analyze regional differences,structural differences,dynamic evolution,and obstacle factors of ANQPFs.The findings show that:(1)There is an upward trend in ANQPFs in the national and the three major regions during the study period,while there are significant differences in ANQPFs by regions,which are characterized by a decreasing distribution from the east to the central,and then to the west.(2)The overall differences in ANQPFs have tended to widen,with inter-regional differences being the main source.(3)Agricultural labor object differences and agricultural labor resource differences are the main structural sources of ANQPFs development differences in China,with agricultural labor resource differences replacing agricultural labor object differences as the top source of ANQPFs differences after 2016.(4)The ANQPFs of the national and three regions show the distribution dynamics of"overall increase,absolute differences widen",and there is the phenomenon of"club convergence"in ANQPFs.(5)The number of Taobao villages,rural entrepreneurial activities,the number of agricultural science and technology patents per capita,and expenditure on agricultural science and technology activities are the main factors obstructing the development of ANQPFs. 展开更多
关键词 agricultural new quality productive forces regional differences structural differences dynamic evolution obstacle factors
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Dynamic ultrasound monitoring of intraperitoneal effusion for predicting complications after laparoscopic gastrectomy 认领 引用
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作者 Xing-Xing Gao Sheng-Hui Su Dan-Dan Huang 《World Journal of Gastrointestinal Surgery》 SCIE 2026年第1期196-210,共15页
BACKGROUND Transabdominal ultrasound monitoring can predict the occurrence of intraperitoneal effusion after laparoscopic gastrectomy and provide data reference for early intervention for postoperative complications.A... BACKGROUND Transabdominal ultrasound monitoring can predict the occurrence of intraperitoneal effusion after laparoscopic gastrectomy and provide data reference for early intervention for postoperative complications.AIM To investigate dynamic monitoring of intraperitoneal effusion after laparoscopic gastrectomy and correlation with prognosis to guide intervention for postoperative complications.METHODS Eighty patients who underwent laparoscopic gastric cancer surgery in a general surgery department over four years was selected.Standardized transabdominal ultrasonography was performed on 1st,3rd and 7th day after surgery.The incidence and nature of the effusion and inflammatory indicators were measured simultaneously.Intraperitoneal effusion risk was analyzed using the generalized estimating equation,linear mixed model was used to evaluate the factors influencing effusion collection,and Cox regression and receiver operating characteristic curves were used to evaluate the effectiveness of complication prediction.RESULTS The incidence of intraperitoneal effusion peaked on the 3rd postoperative day(52.50%,42/80).Subgroup analysis showed a higher risk of fluid accumulation after total gastrectomy.The risk of intraperitoneal effusion after total gastrectomy was 2.10 times that of distal gastrectomy[odds ratio=2.10,95%confidence interval(CI):1.14-3.87]and the risk of diabetes mellitus was increased by 85%(odds ratio=1.85,95%CI:1.04-3.31).The complication risk of mixed effusion increased 3.86 times(hazard ratio=3.86,95%CI:1.62-9.18),and the total complication rate reached 53.57%(15/28).Procalcitonin>0.47 ng/mL on day 3 was the best predictor of infectious complications(area under the curve=0.874,sensitivity:82.9%,specificity:81.7%),followed by C-reactive protein>48.5 mg/L(area under the curve=0.852).There was no significant difference in outcomes between the age subgroups.CONCLUSION Transabdominal ultrasonography accurately captures the evolution of effusion after laparoscopic gastrectomy.It is recommended that high-risk patients undergo focused ultrasonographic at 72 hours postoperatively to facilitate early intervention. 展开更多
关键词 Transabdominal ultrasound monitoring Laparoscopic gastrectomy Dynamic evolution of intraperitoneal effusion Mixed effusion Gastric cancer surgery
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Impact mechanisms of injection temperature and pressure on multi-field evolution and gas production characteristics in in-situ coal-to-hydrogen 认领 引用
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作者 Wenjie Xu Yangsheng Zhao 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2026年第6期1149-1166,共18页
The quantitative regulation mechanisms of injection temperature and pressure on the spatiotemporal multi-field evolution in in-situ coal-to-hydrogen(ISCH)conversion remain poorly understood.We developed a coupled ther... The quantitative regulation mechanisms of injection temperature and pressure on the spatiotemporal multi-field evolution in in-situ coal-to-hydrogen(ISCH)conversion remain poorly understood.We developed a coupled thermal-hydraulic-chemical(THC)model and performed full-factorial simulations to elucidate the competitive interactions between these parameters.Results demonstrate a distinct functional differentiation:injection pressure serves as the decisive lever for the spatial expansion rate,where increasing pressure from 8 MPa to 10 MPa surged the average expansion rate by 200.0%;conversely,injection temperature predominantly governs the induction period,with an increase from 673.15 K to 873.15 K reducing the initiation time by 59.2%.While the system exhibited convergence toward a quasi-steady configuration regardless of initial conditions,high-energy injection strategies effectively suppressed the localized accumulation of carbon byproducts by intensifying fluid transport.Crucially,this study identifies“heat-mass spatial decoupling”-characterized by the spatiotemporal mismatch between the high-temperature core and the reactant field-as the fundamental bottleneck restricting initial hydrogen production efficiency,rather than thermal energy depletion.Accordingly,this study suggests that enhancing spatiotemporal overlap through dynamic pressure modulation and gradient steam-to-oxygen regulation is essential for maximizing ISCH yield. 展开更多
关键词 In-situ coal-to-hydrogen Coupled THC model Injection parameters Heat-mass decoupling Dynamic evolution
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Detecting farmland green production efficiency considering Sustainable Development Goals(SDGs)in the Yellow River Basin:Dynamics,drivers,and challenges 认领 引用
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作者 Chaoqing Chai Yuanyuan Li +10 位作者 Ronghao Wen Hui Zhang Bangbang Zhang Peixue Xingc Ying Sun Huadong Zhu Guanghui Hou Haoyang Wang Wenhao Niu Weiwei Zheng Xiangbin Kong 《Geography and Sustainability》 CSCD 2026年第2期87-101,共15页
Pursuing sustainable growth of Farmland Green Production Efficiency(FGPE)is crucial for achieving multiple Sustainable Development Goals(SDGs),particularly SDG2(Zero Hunger),SDG 12(Responsible Consumption and Producti... Pursuing sustainable growth of Farmland Green Production Efficiency(FGPE)is crucial for achieving multiple Sustainable Development Goals(SDGs),particularly SDG2(Zero Hunger),SDG 12(Responsible Consumption and Production),SDG13(Climate Action),and SDG 15(Life on Land)in ecologically fragile basins.However,the dynamics,drivers,and challenges of FGPE remain underexplored within the SDGs framework,especially at finer spatial scale and across coupled“society-economy-policy-climate”(SEPC)drivers.This study develops an FGPE assessment framework through SDGs lens,utilizing“elements-processes-functions-drivers”paradigm and data from 447 counties in the Yellow River Basin(YRB)from 2000 to 2022.We apply super-efficiency Slacks-Based Measure and Malmquist-Luenberger(SBM-ML),spatial correlation analysis,and geographically and temporally weighted regression models to assess FGPE growth challenges.Results reveal a“U-shaped”trend in the number of high-FGPE counties,with a rapid increase after 2016.Specifically,FGPE across the YRB increased by 97.6%from 2000 to 2022,though spatial correlation declined by 44.7%,indicating weakening spatial spillover effect.Despite the overall progress,the YRB still faces multiple challenges,including uneven regional development,weakening spatial correlation,climate sensitivity,economic structural shift,and weak policy effect.The findings highlight that FGPE improvement align with key SDGs targets,including enhancing food security(SDG 2),promoting sustainable production(SDG 12),increasing climate resilience(SDG 13),and conserving land ecosystems(SDG 15).Region-specific strategies are recommended:enhancing climate resilience and ecological conservation in the upper reaches,promoting technological diffusion via urban-industrial transformation in the middle reaches,and advancing green agricultural technologies with more local financial support in the lower reaches. 展开更多
关键词 Farmland Green Production Efficiency(FGPE) Sustainable Development Goals(SDGs) Spatial-temporal evolution dynamics Society-economy-policy-climate(SEPC) coupled drivers Key challenges Yellow River Basin(YRB)
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Research on the Dynamic Measurement and Mechanism Optimization of Risk Resistance of Tourism Enterprises in Central and Western China 认领 引用
20
作者 Feiran Liu 《Proceedings of Business and Economic Studies》 2026年第4期67-73,共7页
In the era of the digital economy, the deep integration of digital technology and the real economy has emerged as a strategic engine for industrial upgrading. This paper focuses on tourism enterprises in Central and W... In the era of the digital economy, the deep integration of digital technology and the real economy has emerged as a strategic engine for industrial upgrading. This paper focuses on tourism enterprises in Central and Western China, which face inherent vulnerabilities to external shocks due to geographical and structural constraints. We construct a theoretical framework to evaluate the synergy between digital empowerment and traditional tourism operations, investigating its potential impact on enterprise risk resistance from both short-term financial stability and long-term organizational resilience. Through systematic logical deduction and mechanism analysis, this study reveals that digital-real integration can effectively mitigate internal control risks and enhance adaptive capacity through innovation-driven and resource optimization effects. The findings provide a theoretical basis and strategic guidance for the digital transformation and risk management of the tourism industry in less-developed regions. 展开更多
关键词 Digital-real integration Tourism enterprises Risk resistance Dynamic evolution Organizational resilience
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