期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到5,227篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Mechanistic study on activity and SO2 tolerance of CeO2-coated ZrVOx catalysts for selective catalytic reduction of NOx with NH3 认领 引用
1
作者 Mingyu Guo Ke Niu +5 位作者 Guolong Zang Shaoping Cui Qingling Liu Caixia Liu Boqun Liu Yingjie Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第6期1813-1823,I0005,共11页
Since sulfur oxides in the engine exhaust usually lead to the catalyst deactivation,so SO2 resistance under low-temperature conditions serves as a critical performance criterion to the catalysts.A series of ZrVO_(x... Since sulfur oxides in the engine exhaust usually lead to the catalyst deactivation,so SO2 resistance under low-temperature conditions serves as a critical performance criterion to the catalysts.A series of ZrVOx@CeO2 catalysts with excellent catalytic activity and SO2 tolerance was synthesized using the combination of hydrothermal and precipitation methods for the ammonia selective catalytic reduction(NH3-SCR)reaction.In the range of 160-380℃,the NO conversion is consistently over 90%.Notably,with the addition of 200 ppm SO2,the NO conversion stabilizes at 90%within 10 h at 230℃.The CeO2 species are deposited as fine particles on the catalyst surface,forming irregular spherical protrusions.This morphology significantly increases the specific surface area,which in turn enhances the activation and adsorption of reactant.The incorporation of CeO2 modifies the electronic structure of the O 1s orbital,and generates a higher density of oxygen vacancies to maintain electrostatic equilibrium.In situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs)shows that SO2 has little effect on the adsorption and activation of NO and NH3.Therefore,the ZrVOx@CeO2 catalysts exhibit excellent reducibility,effectively enhancing the catalytic performance.Overall,the main mechanism on the ZrVOx@CeO2 catalyst is the Langmuir-Hinshelwood mechanism. 展开更多
关键词 Selective catalytic reduction CeO₂ Vanadate Catalysts SO₂resistance Rare earths
暂未订购 下载PDF
Hydrogen-driven metal-support interaction in Ni-CeO2 catalysts boosting low-temperature CO2 methanation 认领 引用
2
作者 Ru Zhao Siyuan Xu +5 位作者 Junliang Xia Mingxue Wang Xiaoyan Han Yu Xie Qiulin Zhang Ping Ning 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第7期2097-2105,I0004,共9页
Converting CO2 to CH4 under mild conditions represents a promising strategy for carbon emission reduction and synthetic natural gas production,yet it remains challenging.In this work,we accelerated low-temperatu... Converting CO2 to CH4 under mild conditions represents a promising strategy for carbon emission reduction and synthetic natural gas production,yet it remains challenging.In this work,we accelerated low-temperature CO2 hydrogenation over Ni-CeO2 catalysts by optimizing metal-support interactions through H2-driven reconstruction.The catalyst reduced at 400℃(Ni-CeO2-400R)achieved 84.3%CO2conversion with 100%CH4 selectivity even at a low temperature of 250℃.Various in situ spectroscopic characterizations(X-ray photoelectron spectroscopy(XPS),Raman,and diffused reflectance infrared Fourier transform spectroscopy(DRIFTS))and H2/D2 isotopic exchange experiments reveal that the appropriate interaction in Ni-CeO2 motivates the dispersion of metallic Ni sites and the generation of oxygen vacancies,thereby promoting the activation of H2 and CO2 molecules,respectively.Therefore,CO2 is efficiently adsorbed and converted into reactive intermediates and finally hydrogenated to CH4through carbonyl and formate pathways simultaneously.These findings underscore the critical role of tailored metal-support interactions in designing advanced CO2 hydrogenation catalysts. 展开更多
关键词 Low-temperature CO2methanation Ni/CeO2catalysts H2treatment Metal-support interaction Rare earths
暂未订购 下载PDF
Size-Dependent Hydrogen Dissociation Capacity in Ni/CeO2 Catalysts for Low-Temperature CO2 Methanation 认领 引用
3
作者 Yu Xie Zhiyu Li +6 位作者 Xiaoyan Han Mingxue Wang Ru Zhao Siyuan Xu Qiulin Zhang Ping Ning Jiming Hao 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期718-732,共15页
Converting CO2to CH4 under mild conditions is a promising strategy for solving environmental and energy problems,but also a challenge.In this work,the low-temperature CO2 hydrogenation process over Ni/CeO2 ca... Converting CO2to CH4 under mild conditions is a promising strategy for solving environmental and energy problems,but also a challenge.In this work,the low-temperature CO2 hydrogenation process over Ni/CeO2 catalysts was significantly accelerated by optimizing the H2 dissociation ability of Ni through the size effect,thus A-Ni/CeO2 with an average size of 4.9 nm achieved 83.4%CO2conversion with~100%CH4 selectivity even at 225℃.Systematic H2/D2 isotopic exchange experiments,in situ spectroscopic characterizations,and density functional theory(DFT)calculations reveal that the enhanced H2 activation ability not only promoted the creation of oxygen vacancies and hydroxyl group favorable for CO2 adsorption/activation in the pre-reduction process,but also the simultaneous hydrogenation of reactive intermediates belonging to carbonyl and formate pathway into CH4 in the reaction process.This fundamental understanding of the H2 dissociation effect on CO2 activation and hydrogenation provides critical insights for designing catalysts with considerable low-temperature activity,which significantly reduces energy consumption and operating costs for industrial CO2 conversion. 展开更多
关键词 CO2activation H2dissociation low-temperature CO2methanation Ni/CeO2catalysts size effect
暂未订购 下载PDF
Core-shell Pd@CeO2/γ-Al2O3 catalysts:Boosting efficiency and durability in stoichiometric natural gas vehicle exhaust treatment 认领 引用
4
作者 Run Pan Abubakar Yusuf +10 位作者 Chengjun Wang Jianrong Li Zhiyu Xiao Shuai Liu Yidong Zhong Yong Ren Zheng Wang Hainam Do John L.Zhou George Zheng Chen Jun He 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第3期348-362,共15页
Natural gas vehicles(NGVs)offer significant environmental advantages by reducing pollutant emissions,but effective exhaust treatment remains a challenge due to high methane emissions and catalyst deactivation over tim... Natural gas vehicles(NGVs)offer significant environmental advantages by reducing pollutant emissions,but effective exhaust treatment remains a challenge due to high methane emissions and catalyst deactivation over time.This study introduces a core-shell Pd@CeO2/Al2O3 three-way catalyst(TWC)designed to enhance the efficiency and durability of NGV exhaust treatment.The core-shell structure significantly improves catalytic performance.The optimized Pd@Ce/Al(S-500)catalyst demonstrates excellent low-temperature activity,with T50 values of 336℃ for CH4 and 397℃ for NO.It also achieves remarkable reductions of 113 and 177℃ in the T90 for CH4 and NO conversion,respectively,compared to the non-core-shell counterpart,Pd-Ce/Al(S-500).Characterizations reveal enhanced metal-support interactions,increased oxygen vacancies,and optimized Pd-CeO2 interfaces as key active sites.Density functional theory calculations further demonstrate that the core-shell structure facilitates electron transfer at Pd-CeO2 interfaces and lowers energy barriers for three-way reactions,enhancing catalytic efficiency.Notably,the core-shell Pd@Ce/Al(S-500)catalyst maintains high conversion efficiency for CH4 and NO,with only slight losses(5.5% and 6.6%,respectively)over a 100-h time-on-stream stability test,following 16 h of harsh hydrothermal aging at 800℃,showcasing its long-term stability.These findings provide a deeper understanding of the role of the core-shell Pd@CeO2 structure in Pd-based TWCs and offer valuable insights for designing durable and efficient catalysts to meet the stringent emission standards of NGVs. 展开更多
关键词 Core-shell catalyst Pd@CeO2/Al2O3 Natural gas vehicles Stoichiometric combustion Three-way catalysis Hydrothermal stability
暂未订购 下载PDF
Influence of the loading methods of Ni species in Ni/CeO2 catalysts on the performance of CO methanation 认领 引用
5
作者 WANG Runran JIAO Qiyue +5 位作者 LI Ruifang WANG Hong WANG Hongwei BAO Yali WANG Qi WANG Xiaoyan 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第5期1026-1038,共13页
To enhance the low-temperature activity and anti-sintering performance of Ni-based catalysts for CO methanation,mesoporous CeO2supports with a confined structure were synthesized via a hydrothermal method.The effec... To enhance the low-temperature activity and anti-sintering performance of Ni-based catalysts for CO methanation,mesoporous CeO2supports with a confined structure were synthesized via a hydrothermal method.The effects of three Ni loading methods—incipient wetness impregnation,co-precipitation,and bis(cyclopentadienyl)nickel sublimation—on catalytic performance were systematically compared.Characterization techniques,including X-ray diffraction(XRD),N2 adsorption-desorption test,hydrogen temperature-programmed reduction(H2-TPR),Xray photoelectron spectroscopy(XPS),and transmission electron microscopy(TEM),revealed the critical influence of the loading method on Ni species dispersion,particle size,and metal-support interaction.The results indicated that all three mesoporous Ni/CeO2catalysts exhibited excellent anti-sintering properties due to the confinement effect of the support.However,their low-temperature activities differed significantly,primarily determined by the specific state of Ni.In the NC-B catalyst prepared by bis(cyclopentadienyl)nickel sublimation,the interaction between Ni species and the support was relatively weak.After reduction,this method yielded highly dispersed metallic Ni nanoparticles,increasing the number of low-temperature active sites.Consequently,the NC-B catalyst achieved 98%CO conversion rate and 100%CH4 selectivity at 300℃,demonstrating the optimal low-temperature methanation performance. 展开更多
关键词 CO methanation CeO2 Ni-based catalyst anti-sintering metal-support interaction
暂未订购 下载PDF
Effect of preferential CeOx loading on monolithic WO3/CeO2-TiO2 catalysts for NH3-SCR of NOx removal 认领 引用
6
作者 Jing Gao Mingyu Guo +6 位作者 Guang Yang Shaoping Cui Yingjie Zhao Boqun Liu Meng Xiao Ke Niu Sainan Zhou 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第5期1523-1532,共10页
The most effective technology used for NOx removal is selective catalytic reduction with ammonia(NH3-SCR).In contrast to the conventional V2O5-WO3/TiO2 catalyst,cerium-tungsten-titanium oxides catalysts we... The most effective technology used for NOx removal is selective catalytic reduction with ammonia(NH3-SCR).In contrast to the conventional V2O5-WO3/TiO2 catalyst,cerium-tungsten-titanium oxides catalysts were prepared,which significantly broaden the SCR activity window while avoiding the vanadium biotoxicity.The monolithic WO3/CeO2-TiO2-CC catalyst with over 85%NOx conversion in the 275-475℃ range is found by changing the loading sequence of CeO2 and WO3.And it exhibits excellent H2O resistance,maintaining 90%NOx conversion at 325℃.The preferential loading of the redox CeO2 boosts the increase of the surface adsorbed oxygen content and Ce3+ratio.Meanwhile,WO3/CeO2-TiO2-CC exhibits excellent acidity,which facilitates the NH3 adsorption.In situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs)experiments demonstrate that changing the loading sequence of the active components affects the rate of Lewis acid sites consumption and SCR reaction.The negative effect of SO2+O2 adsorption on the catalysts is also demonstrated.SO2 is more likely to be oxidized to SO3 on the CeO2/WO3-TiO2-CC and WO3/CeO2-TiO2-CC,resulting in the formation of metal sulphates and decreasing the catalytic performance.SOx affects the L-H pathway on the three catalysts(CeO2/WO3-TiO2-CC,WO3/CeO2-TiO2-CC and CeO2-WO3/TiO2-CC),and affects the E-R pathway on the WO3/CeO2-TiO2-CC catalyst.Above results indicate that adjusting the binding sequence of CeO2 and WO3 with TiO2 changes the catalysts'redox and acidic properties. 展开更多
关键词 NOₓconversion NH3-SCR WO3/CeO2-TiO2-CC catalyst CeO2 Mechanism Rare earths
暂未订购 下载PDF
Insights into mechanisms of activity promotion and SO2tolerance over NbyFezMnCeOxcatalyst with optimized Nb/Fe molar ratio for low-temperature NH3-SCR reaction 认领 引用
7
作者 Zhian Gong Lulu Long +3 位作者 Jun Cao Shihong Tian Yadi Yang Xiaojiang Yao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第4期1124-1134,I0005,共11页
SO2-induced MnCeOxcatalyst severe deactivation for low-temperature deNOxremains an intractable issue.In this study,the molar ratio of Nb/Fe was innovatively tuned to enhance the SO2tolerance of Nb and Fe c... SO2-induced MnCeOxcatalyst severe deactivation for low-temperature deNOxremains an intractable issue.In this study,the molar ratio of Nb/Fe was innovatively tuned to enhance the SO2tolerance of Nb and Fe co-doped MnCeOxcatalysts.The Nb7Fe3MnCeOxcatalyst shows optimal catalytic performance advantages,achieving over 90%nitrogen oxide conversion and outstanding N2selectivity within a broad activity temperature range(150-250℃),and also admirable SO2-tolerant performance at 250℃.Detailed experimental results indicate that the strong electron transfer among Fe,Ce and Mn species helps to induce the production of surface oxygen vacancy and accelerate redox cycling,and thus improves the catalytic performance at low temperatures.Moreover,in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)experiments unveil the potential SO2tolerance mechanism of the Nb7Fe3MnCeOxcatalyst.Although the Langmuir-Hinshelwood pathway is somewhat constrained after sample sulfation,the Eley-Rideal pathway greatly facilitates the strongly adsorbed ammonia and NO molecules to undergo the selective catalytic reduction(SCR)reaction.The NO molecules are not required to be weakly adsorbed on the Nb7Fe3MnCeOxcatalyst surface as reactive nitrates,thereby relieving the negative effect of sulfation for NOxremoval. 展开更多
关键词 Environmental catalysis NH3-SCR reaction Ce-based catalysts Nb and Fe co-doping SO2tolerance Rare earths
暂未订购 下载PDF
Dynamic evolution of copper-based catalysts during CO2 electroreduction 认领 引用 被引量：2
8
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
暂未订购 下载PDF
Grain boundary engineering of CeO2 induced electron redistribution for dimethyl carbonate synthesis from CO2 认领 引用
9
作者 Guoqiang Hou Di Xu +3 位作者 Haifeng Fan Yangyang Li Siyi Huang Mingyue Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期316-329,共14页
Direct synthesis of dimethyl carbonate(DMC)from CO2 is critical for achieving carbon neutrality,yet the sluggish formation and conversion of the key*CH₃OCOO intermediate-due to the difficulty of C-O coupling-limit ... Direct synthesis of dimethyl carbonate(DMC)from CO2 is critical for achieving carbon neutrality,yet the sluggish formation and conversion of the key*CH₃OCOO intermediate-due to the difficulty of C-O coupling-limit high DMC yields.Herein,we developed a boric acid-assisted recrystallization strategy to fabricate grain-boundary-rich CeO2 hollow nanospheres,which serve as an efficient catalyst for CO2 to DMC synthesis.The introduction of grain-boundary(GBs)induced the electron redistribution,which led a decrease in the electron density of bulk Ce ions and created a localized electron-rich region at homogeneous interface.This unique electronic landscape promoted reactive methoxy formation and stronger CO2 adsorption,thereby enabling more efficient coupling of*CH3O and*CO2 to form the*CH3OCOO.Concurrently,the enhanced CO2 adsorption facilitated the dissociation of*CH3OCOO and subsequent DMC formation.As a result,the 4%BCeO2-GBs achieved an advantageous DMC yield of 19.8 mmol/g.In the assistance of dehydrating agent,the catalyst delivered a remarkable 264.2 mmol/g DMC yield and 7.12%methanol conversion,which was 32 times higher than commercial CeO2.This study elucidated the intrinsic mechanisms governing*CH3OCOO intermediate behavior and offers valuable guidance for CO2 converting into high-value organic chemicals. 展开更多
关键词 Dimethyl carbonate synthesis CeO2 catalyst Grain boundary engineering Electron redistribution Reaction intermediates
暂未订购 下载PDF
Rare earth single atom supported on C2N catalysts for electrochemical CO2reduction:A DFT study 认领 引用
10
作者 Yu Ren Qiannan Zhou +4 位作者 Xiaofei Song Yangyang Song Zean Xie Xuehua Yu Zhen Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第4期1085-1090,I0004,共6页
The electrochemical CO2reduction reaction(CO2RR)can convert CO2into high value-added chemicals,which is conducive to improving climate change and energy crisis.Rare earth single-atom catalysts(SACs)have recen... The electrochemical CO2reduction reaction(CO2RR)can convert CO2into high value-added chemicals,which is conducive to improving climate change and energy crisis.Rare earth single-atom catalysts(SACs)have recently been widely studied in the field of CO2reduction due to their unique properties.Herein,a series of rare earth single-atom metals(abbreviated as RM,which are Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu)supported on C2N were designed and systematically studied for their CO2RR performance.Results show that CH4is the main product on RM@C2N and the limiting potentials are in range of-0.46 to-0.61 V except for Eu@C2N and Yb@C2N.Among them,Tb@C2N,Sm@C2N,and Gd@C2N show high activity and selectivity with limiting potentials of-0.46,-0.47,and-0.48 V.The binding energy of adsorbed oxygen atoms on rare earth SACs can be used as a good descriptor of activity from volcano plot.These results provide insights into the design of rare earth catalysts for CO2RR and valuable guidance for screening single-atom catalysts in theory. 展开更多
关键词 CO2electroreduction Single-atom catalysts Rare earths Density functional theory C2N
暂未订购 下载PDF
Chemically stable TMOx@Ti-MgO(TM=Mn and Cu)catalyst enhanced De/hydrogenation kinetics of Mg/MgH2 认领 引用
11
作者 Haotian Guan Jiang Liu +2 位作者 Qian Li Yangfan Lu Fusheng Pan 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第2期276-284,共9页
Ti-based catalysts have been identified to be efficient in enhancing hydrogenation and dehydrogenation(de/hydrogenation)kinetics of Mg/MgH2.However,their catalytic activity is constrained by the strong Ti-H bond an... Ti-based catalysts have been identified to be efficient in enhancing hydrogenation and dehydrogenation(de/hydrogenation)kinetics of Mg/MgH2.However,their catalytic activity is constrained by the strong Ti-H bond and chemical instability.Herein,we demonstrate that TMOx@Ti-MgO(TM=Mn and Cu)composite catalysts can simultaneously enhance hydrogen dissociation,diffusion and nucleation processes.MgH2 catalyzed by TMOx@Ti-MgO released 6.03-6.14 wt.%H2 within 5 min at 280℃ and 0.89-1.12 wt.%H2 within 60 min at 180℃.The partially oxidized Ti2+and Ti3+states are stabilized in MgO lattice,accelerating hydrogen adsorption,dissociation and diffusion processes.The TMOx,additionally,serve as the active center for nucleation,further improving de/hydrogenation reactions.The TMOx@Ti-MgO catalysts are characterized by high chemical stability,realizing improved cycle properties.These findings suggest a new approach to achieving controllable Catalyst-Hydrogen bond strengths and optimizing performance in de/hydrogenation reactions. 展开更多
关键词 Ti-based catalyst Mg/MgH2 hydrogen storage hydrogen diffusion nucleation
暂未订购 下载PDF
The role of copper valence states in CuZnAl catalysts for CO2-to-methanol conversion 认领 引用
12
作者 QIU Zhengpu XU Yunzhao +11 位作者 WANG Peng TAO Xiaoxia ZHANG Huimin CHEN Yang LIU Yi YANG Hua CAO Fenghai FU Yajie WU Lizhi TANG Yu XU Xiaoying TAN Li 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第4期58-67,共10页
CuZnAl(CZA)is a classic industrial catalyst widely used for the synthesis of methanol from syngas,but its catalytic performance is not optimal for the hydrogenation of CO2 to methanol.Meanwhile,understanding the ca... CuZnAl(CZA)is a classic industrial catalyst widely used for the synthesis of methanol from syngas,but its catalytic performance is not optimal for the hydrogenation of CO2 to methanol.Meanwhile,understanding the catalytic mechanism of Cu species in the CZA catalyst remains a great challenge.In this study,we systematically investigated the valence state change of active Cu species in CZA catalyst and their influence on catalytic performance by modifying the catalysts with varying amounts of electron donor K,thus identifying the catalytic function of Cu species with different valence states.H2-TPR,XPS and HR-TEM characterizations reveal that the highly dispersed K species supported on CZA catalysts will inhibit the reduction of CuO,resulting in a small amount of Cu2O active species being produced under reaction conditions thus causing a decrease in catalytic activity.Furthermore,XRD and Cu LMM spectra show that the proportion of Cu0 in K-modified CZA catalysts increases with K loading,but a higher proportion of Cu0 species on the surface obviously promotes the reverse water gas shift(RWGS)reaction.According to the results of in situ infrared spectroscopy,CZA catalyst follows the reaction pathway mediated by HCOO*in the hydrogenation of CO2 to methanol. 展开更多
关键词 CO2hydrogenation CuZnAl catalysts methanol active species electronic promoter
暂未订购 下载PDF
Tunable C2selectivity in CO electroreduction via charge-asymmetric dual-metal catalysts on ferroelectric In2Se3 认领 引用
13
作者 Dongqiu Zhao Xiao Tang +5 位作者 Yixin Zhang Shuli Liu Di Yuan Chen Long Lin Ju Liangzhi Kou 《Frontiers of physics》 SCIE CSCD 2026年第6期91-100,共10页
The development of efficient catalysts for the electrocatalytic CO reduction reaction toward high-value C2products is critical for addressing pressing energy and environmental challenges.Dual-metal catalysts have e... The development of efficient catalysts for the electrocatalytic CO reduction reaction toward high-value C2products is critical for addressing pressing energy and environmental challenges.Dual-metal catalysts have emerged as promising candidates due to their potential to facilitate C−C coupling,a key step in C2product formation.However,their activity and selectivity are highly dependent on the charge states of the active sites.Modulating asymmetric charge distribution between metal centers offers a viable strategy to enhance C−C coupling efficiency and product selectivity.In this study,we employ density functional theory to investigate heteronuclear dual-atom catalysts(DACs)anchored on ferroelectric In2Se3and impact of polarization on charge states of metal sites.We find that Pd−Nb and Rh−Nb DACs form spatially separated charge centers with opposite signs,which significantly reduce the energy barrier for C−C coupling compared to homonuclear Nb−Nb DACs,enabling thermodynamically favorable C−C bond formation.The Coulomb interaction between oppositely charged centers is identified as a key descriptor governing C−C coupling efficiency.Furthermore,ferroelectric polarization switching of In2Se3offers dynamic modulation of reaction pathways and product selectivity.Pd−Nb@In2Se3under downward polarization(P↓)favors ethane formation with a limiting potential of−1.06 eV,whereas upward polarization(P↑)shifts the reaction toward an alternative C−C coupling pathway with a higher overpotential(−1.47 eV).Similarly,Rh−Nb@In2Se3selectively produces ethanol under P↓,but methane under P↑.Importantly,both Pd−Nb and Rh−Nb DACs exhibit stronger CO adsorption than H adsorption,favoring CORR over the competing hydrogen evolution reaction.These findings underscore the potential of ferroelectric DACs as tunable and selective catalysts for CORR,offering a compelling strategy for the rational design of next-generation electrocatalysts for decarbonization. 展开更多
关键词 electrocatalysis CO reduction reaction dual-atom catalysts polarization switch C2product
暂未订购 下载PDF
One-pot synthesis of mesoporous NiCe/Al2O3catalysts for enhanced carbon dioxide methanation performance 认领 引用
14
作者 Yanyan Feng Yongge Liu +2 位作者 Xinglian Yu Juanjuan Liu Wen Yang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第2期135-145,共11页
The hydrogenation of carbon dioxide(CO2)to methane(CH4)has become an effective strategy for reducing greenhouse gas emissions due to its high efficiencyand low cost,and ordered mesoporous materials have received... The hydrogenation of carbon dioxide(CO2)to methane(CH4)has become an effective strategy for reducing greenhouse gas emissions due to its high efficiencyand low cost,and ordered mesoporous materials have received considerable interest in CO2methanation applications because of their large specificsurface area and well-ordered pore structure.Herein,a series of the Ce-modifiedordered mesoporous catalysts(NiCe/Al2O3)were prepared through a one-pot approach,and the influenceof Ce doping on the morphology and structure of the catalysts as well as the CO2methanation performance were investigated in detail.The XRD and TEM data revealed that the introduction of Ce could effectively lower the particle size of Ni active components and advance the dispersion of Ni species.The H2-TPR profilesdemonstrated that Ce doping facilitated the catalyst's reduction by greatly decreasing its reduction temperature.In addition,the CO2-TPD and XPS data indicated that the incorporation of Ce provided sufficientbasic sites for CO2activation and adsorption,and the oxygen vacancies of the Cedoped Ni-based catalysts were significantlyenhanced.Obviously,the catalyst 30Ni10Ce/Al2O3achieved the outstanding catalytic performance,achieving CO2conversion of 90.7%and CH4 selectivity of 99.8% at 375℃,and even after 60 h of continuous reaction,it still maintained the stable catalytic activity,which suggested that the Ce-doped Ni-based catalysts can offer significantpromising applications in CO2methanation. 展开更多
关键词 CO2methanation Ni-based catalyst Mesoporous Al2O3 Ce doping Oxygen vacancy
暂未订购 下载PDF
CO2hydrogenation to methanol on the incapsulated Cu-Zn catalyst:Effect of the MCM-41 and SBA-15 supports and the method of preparation on catalytic activity 认领 引用
15
作者 Anastasiya Shesterkina Christina Zhdanova +5 位作者 Nikolay Davshan Artem Medvedev Konstantin Kalmykov Sergey Dunaev Leonid Kustov Alexander Kustov 《Green Synthesis and Catalysis》 CSCD 2026年第3期328-336,共9页
The catalytic conversion of carbon dioxide to methanol is of great practical and scientific importance in the concept of reducing CO2emissions.Moreover,it can partially solve the problem of human dependence on non-... The catalytic conversion of carbon dioxide to methanol is of great practical and scientific importance in the concept of reducing CO2emissions.Moreover,it can partially solve the problem of human dependence on non-renewable resources.The development of selective and active catalysts for CO2hydrogenation is a key point due to the strong thermodynamic limitations and high chemical stability of CO2.In this work,the influence of the nature of the mesoporous supports,as well as the method of introducing the active component,on the catalytic properties of Cu–Zn catalysts in the CO2hydrogenation to methanol were investigated.A series of bimetallic Cu-Zn catalysts deposited on mesoporous MCM-41 and SBA-15 supports were prepared by two methods:encapsu-lation and incipient wetness impregnation.The obtained catalysts were characterized by N2adsorption,X-ray diffraction(XRD),scanning electron microscopy-energy dispersive X-ray spectroscopy(SEM-EDX),and ther-mogravimetry-differential thermal analysis(TG-DTA)methods.The highest CO2conversion and methanol space-time yield were observed over the encapsulated Cu–Zn catalyst based on the MCM-41 support.The optimal process temperature was 280℃,at which a high selectivity of 92%methanol formation was achieved while maintaining the best CO2conversion.The study demonstrates the prospects of using bimetallic Cu-Zn catalysts encapsulated in MCM-41 for direct CO2hydrogenation for“green”methanol production. 展开更多
关键词 CO2hydrogenation Cu-Zn catalyst Methanol MCM-41 SBA-15
Optimizing CuO on 3D Ordered Macroporous CeO2 for CO Oxidation in Rich Hydrogen 认领 引用
16
作者 Xiaohua Chen Guoqiang Song +5 位作者 Fangfei Liyan Claudia Li Wenxia Zhou Feiyang Hu Lei Gong Sibudjing Kawi 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期841-852,共12页
CO preferential oxidation (CO-PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells,but obtaining good activity at low temperatures is still a challenge.Herein,three-dimensional or... CO preferential oxidation (CO-PROX) in rich H2 is considered a feasible strategy to solve CO poisoning for fuel cells,but obtaining good activity at low temperatures is still a challenge.Herein,three-dimensional ordered macroporous (3DOM) CuO/CeO2 catalysts were fabricated by a templating approach,with the metal-support interaction (MSI) adjusted through active metal loading.The 10CuO/CeO2 catalyst achieves complete CO conversion at 110℃ and demonstrates excellent stability.Characterization studies have shown that the 10CuO/CeO2 catalyst has abundant active sites and oxygen vacancies;this phenomenon could potentially be attributed to the synergistic effects arising from the MSI between CuO and CeO2.Moreover,in situ diffuse reflectance infrared Fourier transform spectra (in situ DRIFTS) were used to identify the intermediates and confirm that appropriate MSI enhances CO adsorption and activation.The findings of this study make significant contributions to the advancement of 3DOM CuO/CeO2 catalysts for CO-PROX and establish a promising strategy for optimizing the MSI in supported catalyst systems. 展开更多
关键词 CO preferential oxidation CuO/CeO2catalysts metal-support interaction ordered macroporous structure rich H2atmosphere
暂未订购 下载PDF
Anion-regulated reconstruction of bismuth-based electrocatalysts for enhanced electrocatalytic CO2 reduction 认领 引用
17
作者 Lili Wang Bangwei Deng +5 位作者 Hongtao Xie Xianlong Lu Pengcheng Xiang Xueyang Zhao Yizhao Li Fan Dong 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期598-609,I0014,共12页
Elucidating the active site formation mechanism of bismuth(Bi)-based catalysts in electrochemical CO2reduction remains challenging for achieving high activity,selectivity,and long-term stability.Here we confirm thr... Elucidating the active site formation mechanism of bismuth(Bi)-based catalysts in electrochemical CO2reduction remains challenging for achieving high activity,selectivity,and long-term stability.Here we confirm through experimental results that Bi-based catalysts containing halogen ions(I-,Cl-,Br-)and SO42-maintain the system stability,keeping Faraday efficiency of formic acid above90%in the current range of 50-800 mA cm-2.In contrast,anions containing S2-and NO3-in the electrolyte can be reduced to produce by-products.These anions and their by-products could poison the active center,leading to increased side reactions and thus significantly reducing the Faraday efficiency of formic acid.The combination of non-in situ and in situ characterization results revealed that the Bi-based catalysts all underwent the transition from the initial state to the Bi/Bi2O2CO3(BOC)intermediate state in high-concentration KHCO3 solution,and the different anions could selectively modulate the degree of exposure of specific crystalline surfaces of BOC.At the late stage of the reaction,BOC was completely converted to metal Bi and became the real active center.Combined with in situ IR and DFT calculations,it is further verified that*OCHO is the key intermediate on the metallic Bi surface,which is most favorable for formic acid formation.This study reveals the key mechanism by which anions affect the formation of active sites via modulating the catalyst reconstruction process,which provides an important theoretical basis for the design and optimization of test conditions of Bi-based catalysts. 展开更多
关键词 Bismuth-based catalysts Surface reconstruction Electrocatalytic CO2reduction Anion effects In situ spectroscopy
暂未订购 下载PDF
Cu-Based Catalysts Design Toward Electrochemical CO2 Reduction to Valuable Multi-Carbons Products 认领 引用
18
作者 Li‑Qing Li Min‑Xiao Huang +3 位作者 Hong Ke Wei‑Wei Zhu Jing‑Hua Zhao Li‑Hua Zhu 《Rare Metals》 SCIE EI CAS CSCD 2026年第4期284-303,共20页
Electrochemical reduction of CO2 to multi-carbon products(e.g.,C2+ ,ethene,ethanol,etc.)not only effectively decreases the CO2 concentration in atmosphere but also shows great potential economic benefits due ... Electrochemical reduction of CO2 to multi-carbon products(e.g.,C2+ ,ethene,ethanol,etc.)not only effectively decreases the CO2 concentration in atmosphere but also shows great potential economic benefits due to these exploitable value-added products.The Cu-based catalysts have caught much attention in CO2 electroreduction due to the good selectivity to hydrocarbons products.However,designing appropriate Cu-based catalysts is desirable to further improve the energy efficiency and selectivity of specific C2+ product.In this review,primary pathways of CO2 electroreduction to C2+ products are first discussed to summarize the key elementary steps of C2+ products formation.Subsequently,various strategies of catalytic activity regulation of Cu-based catalysts are classified into geometric and electronic structures modification based on the inner correlation between these strategies and the mechanism of C2+ products formation.The review ends with a cross-scale perspective that links the selectivity enhancement of a specific C2+ product and the target design of Cu-based catalysts. 展开更多
关键词 catalytic activity regulation Cu‑based catalysts electrochemical CO2reduction
暂未订购 下载PDF
Cu负载量对Cu/CeO2催化CO2加氢制甲醇性能的影响 认领 引用
19
作者 李传 谭延芹 +6 位作者 甘泽 何欣颖 张世博 粟子凌 罗辉 邓文安 杜峰 《中国石油大学学报（自然科学版）》 EI CAS CSCD 北大核心 2026年第2期202-210,共9页
研究Cu负载量为10%、20%及30%的Cu/CeO2催化剂对CO2加氢制甲醇性能的影响,采用XRD、BET和CO2-TPD等表征手段,分析Cu负载量对催化剂加氢性能影响的机制。结果表明:Cu负载量(质量分数)为20%的催化剂活性最佳,其在反应温度为240... 研究Cu负载量为10%、20%及30%的Cu/CeO2催化剂对CO2加氢制甲醇性能的影响,采用XRD、BET和CO2-TPD等表征手段,分析Cu负载量对催化剂加氢性能影响的机制。结果表明:Cu负载量(质量分数)为20%的催化剂活性最佳,其在反应温度为240℃、反应压力为3 MPa、质量空速为12000 mL/(g·h)以及V(H 2)/V(CO2)=3∶1时,CH3OH的选择性和时空收率为85.2%和13.8 g/(kg·h);Cu负载量为20%的催化剂呈现最小CeO2晶格参数和晶粒尺寸,比表面积最大,碱性活性位点数量最多,说明适宜的Cu负载量可增强Cu物种在CeO2载体表面的分散度,增大反应原料与催化剂的接触面积,提高催化剂对CO2分子的吸附能力,从而实现CO2加氢制甲醇反应中Cu/CeO2催化剂催化性能的提升。 展开更多
关键词 Cu负载量 Cu/CeO2催化剂 CO2加氢制甲醇 催化剂结构 机制
暂未订购 下载PDF
Reactive CO2 capture electrolysis at low voltage and high single-pass conversion enabled by ultra-low loading molecular catalyst 认领 引用
20
作者 Yuming Wu Guohao Li +7 位作者 Mengxin Liu David Inglis Yasuhiro Sakamoto Lizhuo Wang Zhiqiang Zhao Catherine Stampfl Feng Jiao Yijiao Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期728-737,I0018,共10页
Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumven... Integrating electrochemical CO2 conversion with carbon capture extends the CO2 source beyond pure or point-source streams.By directly interfacing with capture units,reactive CO2 capture electrolysis circumvents the energy-intensive regeneration and compression processes to supply pure CO2 stream,also minimizes the amount of unreacted CO2 through gas-fed CO2 electrolysis.However,the conversion pathway is hampered by high electrolyser voltages and reliance on precious and thick metal catalysts(>2.0 mg cm-2).Here,we report an energy-efficient reactive CO2 capture electrolysis system enabled by an ultra-low loading molecular catalyst(cobalt phthalocyanine anchored onto multi-walled carbon nanotubes,Co Pc/CNT).When the Co Pc/CNT exceeds 0.2 mg cm-2loading on cathode,the thicker Co Pc/CNT layer largely increase electrical and mass transfer resistances.This limits the availability of local CO2 at the catalyst surface,suppressing the formation of adsorbed intermediates(COOH*/CO*)on cobalt centres,as observed by operando Raman spectroscopy.Benefiting from the features,the electrolysis system achieves a single-pass CO2 conversion of 55.1%at 300 m A cm-2 and a faradaic efficiency of CO(FECO)84.7%at a 0.2 mg cm-2.At 100 m A cm-2,the synergistic combination of Co Pc/CNT with a two-layer membrane architecture reduces electrolyser voltage by 30%to widely used bipolar membrane(BPM)-incorporated electrolyser and 17%voltage to metal catalyst-based cathode.This study offers a costeffective molecular catalyst for reactive CO2 capture electrolysis and paves the way for energy-efficient carbon capture and utilisation integrated systems. 展开更多
关键词 Reactive CO2capture Bicarbonate electrolysis CO2capture and utilization Cobalt phthalocyanine Low catalyst loading High conversion yield
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈