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Key components for realistic application of plastic photoreforming coupled with H2 evolution 认领 引用
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作者 Jinpeng Zhang Teng Liang +7 位作者 Jaenudin Ridwan Tian Chen Elhussein M. Hashem Meijun Guo Amin Talebian-Kiakalaieh Le Yu Ping She Jingrun Ran 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期20-37,共18页
Green hydrogen(H2)energy plays an important role in combating climate change,promoting energy transition,and fostering sustainable development.Solar-driven plastic photoreforming afford an attractive solution,it ov... Green hydrogen(H2)energy plays an important role in combating climate change,promoting energy transition,and fostering sustainable development.Solar-driven plastic photoreforming afford an attractive solution,it overcomes the limitation of the slow oxygen evolution half-reaction in overall water splitting while tackling environmental pollution and resource waste caused by plastics.However,this technology still rests on the experimental stage,and the transition from laboratory to realistic application remains lacking systematic view.In this review,key components for plastic photoreforming,including plastic pretreatment routes,photocatalysts exploration,basic photocatalytic modules for the realistic application,and feasibility,are investigated.Finally,outlook in this area is discussed. 展开更多
关键词 Photocatalysis Plastic photoreforming H2evolution Value-added chemicals Multifunctional catalysts
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2D/2D heterointerface engineering of Ni2P/ZnIn2S4 photocatalysts for enhanced photocatalytic H2 evolution 认领 引用
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作者 Zeyu Yang Yinghong Ji +3 位作者 Jiali Ren Xinyu Wang Yanjun Xue Jian Tian 《Materials Reports(Energy)》 EI 2026年第2期111-119,共9页
Zinc indium sulfide(ZnIn2S4)possesses excellent photosensitivity and a suitable band structure,exhibiting su-perior photocatalytic activity under visible light.However,rapid recombination of photogenerated carri... Zinc indium sulfide(ZnIn2S4)possesses excellent photosensitivity and a suitable band structure,exhibiting su-perior photocatalytic activity under visible light.However,rapid recombination of photogenerated carriers and sulfide poisoning inhibit its photocatalytic hydrogen production performance.In this study,Ni2P nanosheets as cocatalysts were assembled onto the surface of ZnIn2S4 nanoflowers(Ni2P@ZnIn2S4)for photocatalytic H2 production.The 6 wt%Ni2P@ZnIn2S4 with the optimal ratio exhibited a significantly enhanced photocatalytic H2 evolution activity(5.82 mmol g-1h-1),which is twice that of ZnIn2S4(2.85 mmol g-1h-1)and 1.14 times that of Pt/ZnIn2S4(5.11 mmol g-1h-1).In addition,the apparent quantum efficiency(AQE)of Ni2P@ZnIn2S4 reaches 5.70% and 1.03% at 370 and 456 nm.According to the experimental data and DFT calculation,the improvement in the catalytic performance of Ni2P@ZnIn2S4 is attributed to the following points:1)ZnIn2S4 nanoflowers composed of 2D nanosheets can improve light absorption,enhance charge and mass transfer,and increase the specific surface area.2)2D Ni2P as a co-catalyst could better couple with the 2D sheet unit of ZnIn2S4,improving charge transport,suppressing photogenerated carrier recombination,and providing Ni active sites for surface redox reactions.These synergistic effects highlight the spatial separation and interfacial transfer of photogenerated carriers between semiconductors and cocatalysts achieved through two-dimensional nano-sheet heterostructures,providing an effective solution to the carrier recombination problem. 展开更多
关键词 ZnIn2S4nanoflowers Ni2P nanosheets Co-catalysts Photocatalytic H2evolution
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Synergistic CO2-Philic/H2O-Phobic Interface Engineering in PEDOT/NHCS/Au Composite for High-Efficiency CO2 Electroreduction With Suppressed Hydrogen Evolution Reaction 认领 引用
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作者 Nuramina Abdukirim Tursun Abdiryim +5 位作者 Ruxangul Jamal Shuyue Xie Zhigang Wang Yaoming Yu Zhouliang Tan Feng Xu 《Carbon Energy》 SCIE EI CAS CSCD 2026年第4期103-118,共16页
The electrocatalytic CO2 reduction reaction(CO2 RR)offers a viable solution for the conversion and storage of renewable energy.Utilizing electronic metal-support interactions(EMSI)to adjust the electronic proper... The electrocatalytic CO2 reduction reaction(CO2 RR)offers a viable solution for the conversion and storage of renewable energy.Utilizing electronic metal-support interactions(EMSI)to adjust the electronic properties of metal catalysts has demonstrated effectiveness in enabling highly selective CO2 electroreduction.Here,a cleverly designed ternary composite is presented,which is synthesized by using nitrogen-doped hollow carbon spheres(NHCS)as the substrate and coating them with poly(3,4-ethylenedioxythiophene)(PEDOT)to form a PEDOT/NHCS support for anchoring Au nanoparticles.This innovative design enables the catalyst to reach a stunning 98.21% at-0.8 V versus RHE,achieving an extraordinarily high Faradaic efficiency for CO(FECO)over a broad potential window(-0.6 to-1.5 V vs.RHE).The result is mainly due to the Au-S bond between the S in the PEDOT thiophene ring and the metal Au,which induces electron transfer,causing the d-band center of the Au atoms to shift negatively.The hydrophobic surface of PEDOT and the hollow structure of NHCS synergistically construct an interface of“CO2-philic and H2O-phobic.”This interface,in coordination with the Au NPs,enhances CO2 adsorption,stabilizes the *COOH intermediate,accelerates the desorption of *CO,and simultaneously weakens the competitive adsorption of *H,effectively suppressing the HER. 展开更多
关键词 Au-based catalysts electrocatalytic CO2reductions hydrogen evolution reaction NHCS PEDOT
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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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Ion exchange for enhancing MOF adsorbents performance in humid C2H2/CO2separation 认领 引用 被引量：1
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作者 Muzi Li Xin Zhang +4 位作者 Xiang-Jing Kong Qiancheng Chen Xuefeng Bai Tao He Jian-Rong Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期689-693,共5页
The gas separation performance of metal-organic framework(MOF)adsorbents could be enhanced by tuning the pores,whereas the presence of moisture usually compromises the efficiency.Herein,two MOFs,Fe-BDC-TPT-BF4,Ni-B... The gas separation performance of metal-organic framework(MOF)adsorbents could be enhanced by tuning the pores,whereas the presence of moisture usually compromises the efficiency.Herein,two MOFs,Fe-BDC-TPT-BF4,Ni-BDC-TPT-TMA(TMA+=(CH3)4N+),were synthesized by exchanging countering ions in parent MOFs,Fe-BDC-TPT-Cl and Ni-BDC-TPT-Me2NH2,respectively.Fe-BDC-TPT-BF4and Ni-BDCTPT-TMA exhibited a high C2H2adsorption uptake of 203.1 cm3/g and 200.1 cm3/g at 298 K and 1 bar,and high C2H2/CO2selectivity of 4.6 and 4.4.Humid breakthrough experiments revealed that high C2H2productivity of high C2H2purity was achieved on Ni-BDC-TPT-TMA at 35%relative humidity.Cycling dynamic breakthrough experiments demonstrate good recyclability of Ni-BDC-TPT-TMA for humid C2H2/CO2separation.The alteration of countering ions changed the pore size and chemistry,leading to high C2H2uptake,high C2H2selectivity,and retained performance in the presence of moisture,making it a promising candidate for practical applications.This work highlights that ion exchange modification of MOFs has been developed as a facile and powerful strategy to optimize the inner pores for better performance in challenging separations. 展开更多
关键词 Metal-organic framework Ion exchange Acetylene purification C2H2/CO2separation Humid condition
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Defect-engineered S-scheme charge transfer in TiO2/Zn0.5Cd0.5S heterojunction for high-efficiency photocatalytic hydrogen evolution 认领 引用
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作者 Baolong Zhang Bin Sun +3 位作者 Xingpeng Liu Wenyu Liu Shaonan Gu Guowei Zhou 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第5期117-129,共13页
Photocatalytic water splitting for H2evolution represents a viable approach to address energy and environmental challenges,but it still remains a significant challenge by inefficient light absorption,insufficient c... Photocatalytic water splitting for H2evolution represents a viable approach to address energy and environmental challenges,but it still remains a significant challenge by inefficient light absorption,insufficient charge separation,and weak redox potentials.To tackle these problems,a defect-engineered S-scheme photocatalyst is designed and constructed by in-situ growing Zn0.5Cd0.5S nanoparticles on flower-like TiO2microspheres with oxygen vacancies(TiO2-Ov)via a hydrothermal method,thus forming defect-engineered TiO2-Ov/Zn0.5Cd0.5S S-scheme heterojunction.Remarkably,the optimal heterojunction achieves a superior H2evolution rate of 15.31 mmol g-1h-1,surpassing those of TiO2,TiO2-Ov,Zn0.5Cd0.5S,and defect-free TiO2/Zn0.5Cd0.5S by factors of 306.2,56.7,4.7,and 1.9,respectively.Notably,the presence of oxygen vacancies in TiO2-Ov enables a broadened light absorption and introduces an intermediate energy level to provide an additional photo-induced charge transfer channel within the S-scheme heterojunction.Combining with defect engineering and S-scheme mechanism,the photocatalytic system significantly exhibits enhanced light-harvesting ability,accelerated the spatial separation and transfer of photo-induced charge,and preserved strong redox power.Simultaneously,the S-scheme charge transfer pathway in the TiO2-Ov/Zn0.5Cd0.5S heterojunction is systematically validated through a combination of in-situ irradiated X-ray photoelectron spectroscopy,kelvin probe force microscopy,femtosecond transient absorption spectra,electron paramagnetic resonance,and density functional theory calculation.This work highlights the synergistic effect of defect engineering and S-scheme heterojunction in boosting photocatalytic H2evolution,offering insights for designing high-performance photocatalyst. 展开更多
关键词 Defect engineering TiO2/Zn0.5Cd0.5S S-scheme Dual charge transfer pathways Photocatalytic H2evolution
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Strategically designing and fabricating nitrogen and sulfur Co-doped g-C3N4 for accelerating photocatalytic H2 evolution 认领 引用 被引量：6
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作者 Haitao Wang Lianglang Yu +2 位作者 Jiahe Peng Jing Zou Jizhou Jiang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第5期111-119,共9页
Doping engineering is an effective strategy for graphitic carbon nitride(g-C3N4)to improve its photocat-alytic hydrogen evolution reaction(HER)performance.In this work,a novel nitrogen and sulfur co-doped g-C_(3... Doping engineering is an effective strategy for graphitic carbon nitride(g-C3N4)to improve its photocat-alytic hydrogen evolution reaction(HER)performance.In this work,a novel nitrogen and sulfur co-doped g-C3N4(N,S-g-C3N4)is elaborately designed on the basis of theoretical predictions of first-principle density functional theory(DFT).The calculated Gibbs free energy of adsorbed hydrogen(ΔGH∗)for N,S-g-C3N4 at the N-doping active sites is extremely close to zero(0.01 eV).Inspired by the theoretical predictions,the N,S-g-C3N4 is successfully fabricated through ammonia-rich pyrolysis synthesis strategy,in which ammonia is in-situ obtained by pyrolyzing melamine.Subsequent characterizations indicate that the N,S-g-C3N4 possesses high specific surface area,outstanding light utilization,good hydrophilicity,and efficient carrier transfer efficiency.Consequently,the N,S-g-C3N4 displays an extremely high H2 evolution rate of 8269.9μmol g−1 h−1,achieves an apparent quantum efficiency(AQE)of 3.24%,and also possesses outsatnding durability.Theoretical calculations further demonstrate that N and S dopants can not only introduce doping energy level to reduce the band gap,but also induce charge redistribution to facilitate hydrogen adsorption,thus promoting the photocatalytic HER process.Moreover,femtosecond transient absorption(fs-TA)spectroscopy further corroborates the efficient photogenerated carrier transport of N,S-g-C3N4.This research highlights a promising and reliable strategy to achieve superior photocatalytic activity,and exhibits significant guidance for precise designing high-efficiency photocatalysts. 展开更多
关键词 Theoretical predictions g-C3N4 N and S co-doping Photocatalytic H2evolution
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Bottom-Up Strategy Toward 3D Porous MXene/MoS2Nanosheets/Graphene Nanoarchitectures as Highly-Efficient Hydrogen Evolution Electrocatalysts 认领 引用 被引量：1
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作者 Haiyan He Yuxian Chen +6 位作者 Chenyu Xu Taiji Gan Chi Ge Quanguo Jiang Jian Zhang Lei Lei Huajie Huang 《Rare Metals》 SCIE EI CAS CSCD 2026年第3期546-555,共10页
As a core component in the electrochemical water splitting system,the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction(HER),while the scarcity and expenditure of current noble me... As a core component in the electrochemical water splitting system,the cathode catalyst is capable of boosting the kinetics of the hydrogen evolution reaction(HER),while the scarcity and expenditure of current noble metal-based electrocatalysts seriously restrict the large-scale commercial development of hydrogen manufacturing devices.Here,we present a robust and controllable self-assembly method for the spatial construction of three-dimensional(3D)porous ternary nanoarchitectures comprising Ti3C2Tx MXene,MoS2nanosheets,and graphene(MX/MoS2/G).This bottom-up strategy contributes to the intriguing structural features of the resulting nanoarchitectures,including 3D crosslinked porous networks,ultrathin walls,plentiful exposed reactive sites,and numerous efficient electron channels.As a consequence,the optimized MX/MoS2/G electrocatalyst depicts superior electrocatalytic HER performance in terms of a competitive onset potential,a small Tafel slope,a large electrochemically active surface area,and exceptional durability,which significantly outperforms the bare MXene,MoS2,graphene,as well as binary MXene/graphene and MoS2/graphene electrocatalysts. 展开更多
关键词 3D graphene electrocatalyst hydrogen evolution MoS2nanosheets Ti3C2TxMXene
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Boosting H2O2 evolution of CdS via constructing a ternary photocatalyst with earth-abundant halloysite nanotubes and NiS co-catalyst 认领 引用 被引量：2
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作者 Hongfen Li Yihe Zhang +4 位作者 Jianming Li Qing Liu Xiaojun Zhang Youpeng Zhang Hongwei Huang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2025年第2期111-122,共12页
Hydrogen peroxide(H2O2),an environmentally friendly chemical with high value,is extensively used in industrial production and daily life.However,the traditional anthraquinone method for H2O2 production is ... Hydrogen peroxide(H2O2),an environmentally friendly chemical with high value,is extensively used in industrial production and daily life.However,the traditional anthraquinone method for H2O2 production is associated with a highly energy-consuming and heavily polluting process.Solor-driven photocatalytic evolution of H2O2 is a promising,eco-friendly,and energy-efficient strategy that holds great potential to substitute the traditional approach.Here,a ternary photocatalyst,NiS/CdS/Halloysite nanotubes(NiS/CdS/HNTs)is designed and prepared with an earth-abundant clay mineral HNTs as the support and NiS as a co-catalyst.The pivotal roles of HNTs and NiS in the photocatalytic process are elucidated by experiments and theoretical calculations.HNTs serve as the carrier,which allows CdS to be uniformly dispersed onto its surface as small particles,increasing effective contact with H2O and O2 for H2O2 formation.Simultaneously,it resulted in the formation of a Schottky junction between NiS and CdS,which not only favors photogenerated charges separating efficiently but also provides a unidirectional path to transfer electrons.Consequently,the optimized NiS/CdS/HNTs composite demonstrates an H2O2 evolution rate of 380.5μmol·g-1·h-1 without adding any sacrificial agent or extra O2,nearly 5.0 times that of pure CdS.This work suggests a feasible idea for designing and developing highly active and low-cost solar energy catalytic composite materials. 展开更多
关键词 Photocatalytic H2O2evolution Ternary photocatalyst NiS/CdS/HNTs Carrier separation Schottky junction
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WO3@TP无机@有机S型光催化剂用于促进产H2O2 认领 引用
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作者 朱文君 艾陈斌 +3 位作者 许凯强 周亚太 张锡东 张勇 《物理化学学报》 SCIE CAS CSCD 北大核心 2026年第3期118-134,共17页
利用氧气和水光催化生产过氧化氢(H2O2)是一种经济环保的工艺,但开发高性能光催化剂仍具挑战性。本研究通过室温下在WO3纳米纤维表面原位生长席夫碱聚合物三(4-氨基苯基)胺(TAPA)-对苯二甲醛(PDA)(标记为TP),成功合成了WO3... 利用氧气和水光催化生产过氧化氢(H2O2)是一种经济环保的工艺,但开发高性能光催化剂仍具挑战性。本研究通过室温下在WO3纳米纤维表面原位生长席夫碱聚合物三(4-氨基苯基)胺(TAPA)-对苯二甲醛(PDA)(标记为TP),成功合成了WO3@聚合物S型光催化剂(WO3@TP)。所制备的WO3@TP S型异质结展现出快速的载流子分离能力和较短的光生载流子传输距离。最优的WO3@TP复合材料(WT-10)实现了3242μmol g-1h-1的H2O2产率,分别是纯WO3和TP的137.3倍和4.6倍。通过原位辐照X射线光电子能谱(ISI-XPS)、理论计算和飞秒瞬态吸收光谱(fs-TAS)等先进表征手段的结合,验证了WO3@TP S型异质结内的电荷转移机制。电子顺磁共振(EPR)和原位漫反射红外傅里叶变换光谱(DRIFTS)证实了反应体系中存在双通道路径(氧气还原反应(ORR)与水氧化反应(WOR)),从而促成高效H2O2生产。该研究不仅深化了对S型异质结中超快电荷迁移行为的理解,还为应用于太阳能驱动H2O2生产的无机@有机光催化剂提供了合理设计思路。 展开更多
关键词 光催化H2O2生成 S型异质结 聚合物 超快电荷转移 WO3纳米纤维
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不同浓度H2S和NO处理对草莓货架期腐烂抑制及抗氧化相关基因表达的影响 认领 引用
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作者 李昱昕 吉宁 +4 位作者 高琪 王瑞 聂华丽 邹伟 李冉冉 《南方农业学报》 CAS CSCD 北大核心 2026年第2期499-510,共12页
【目的】探究硫化氢(H2S)和一氧化氮(NO)气体对草莓货架期腐烂抑制、抗氧化相关酶活性及相关基因表达的调控作用,筛选最佳处理浓度,为草莓采后保鲜提供技术支持。【方法】以红颜草莓为试材,分别采用不同浓度(50、100、200和400µ... 【目的】探究硫化氢(H2S)和一氧化氮(NO)气体对草莓货架期腐烂抑制、抗氧化相关酶活性及相关基因表达的调控作用,筛选最佳处理浓度,为草莓采后保鲜提供技术支持。【方法】以红颜草莓为试材,分别采用不同浓度(50、100、200和400µL/L)的H2S和NO进行单独熏蒸处理,以不经气体熏蒸处理为对照组(CK),在(20±0.5)℃条件下贮藏6 d,货架期定期测定果实腐烂率、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)和多酚氧化酶(PPO)活性及相关基因的相对表达量,并通过相关分析和主成分分析对各指标之间的关系进行综合分析。【结果】与CK组相比,所有H2S和NO处理均能抑制果实腐烂并提高抗氧化能力。其中200µL/L H2S处理效果最明显,货架期第5 d时,CAT和APX活性分别达26.26 U/g和50.89 U/(g·min),分别是CK组的2.02和4.72倍,货架中后期(4~6 d)显著上调FaSOD、FaCAT、FaPOD、FaAPX基因相对表达量(P<0.05,下同),同时抑制FaPPO基因表达和PPO活性,有效延缓果实氧化伤害和褐变进程;货架期第6 d时,腐烂率仅24.25%,较CK组(91.67%)显著下降73.55%,且低于同浓度NO处理组(33.30%),果实色泽保持良好,无明显变化。相关分析结果显示,腐烂率与FaSOD和FaPPO基因相对表达量呈极显著正相关(P<0.01)。主成分分析综合得分表明,200µL/L H2S处理在各项指标中表现最优,货架期间综合得分始终最高,具有最佳的综合调控效果。【结论】200µL/L H2S处理在草莓货架期内表现出良好的品质调控能力,在激活抗氧化系统与延缓褐变方面具有良好协同作用,可作为延长草莓货架期的有效措施。 展开更多
关键词 草莓 H2S NO 货架品质 抗氧化活性
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Carbon dots mediated excitons dissociation in defect engineering for high-efficient visible-light-driven overall H2O2 photosynthesis from pure water 认领 引用
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作者 Kaiqu Sun Zixuan Guo +6 位作者 Jun Luo Xueying Wang Haoyuan Qin Lijing Wang Nan Zhao Changyu Lu Weilong Shi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期174-188,共15页
The pursuit of an efficient photocatalytic pathway for hydrogen peroxide(H2O2)synthesis from pure water without adding additional sacrifice agents poses a formidable research endeavor and remains a pivotal chall... The pursuit of an efficient photocatalytic pathway for hydrogen peroxide(H2O2)synthesis from pure water without adding additional sacrifice agents poses a formidable research endeavor and remains a pivotal challenge.Herein,we demonstrate that incorporating hexaketocyclohexane-derived carbon dots(H-CDs)and S vacancies into ZnIn2S4 weakens the exciton effect,leading to the dissociation into free carriers that participate in the dual pathways of oxygen reduction reaction and water oxidation reaction,thereby achieving efficient photocatalytic H2O2 production with a high H2O2 yield of 17.8 mM/g/h under visible light in pure water.Experimental results combined with theoretical calculations clearly illustrate that the presence of H-CDs and S vacancies modulates the local charge density of ZnIn2S4,markedly diminishing the exciton binding energy and facilitating the occurrence of exciton dissociation.Moreover,S vacancies and H-CDs effectively capture free electrons and extract free holes,respectively,significantly inhibiting the recombination of photogenerated electron-hole pairs.By optimizing the electronic structure and optical properties of ZnIn2S4,they thermodynamically satisfy the conditions for oxygen reduction and water oxidation reactions.Additionally,the synergy between H-CDs and S vacancies in ZnIn2S4 enhances the adsorption of oxygen and intermediate products,increasing their participation in the reaction and facilitating the conversion to H2O2.This work offers novel insights into catalyst design from the perspective of excitons dissociation,and underscores the distinct roles that free charge carriers play in various pathways for photocatalytic H2O2 production. 展开更多
关键词 Photosynthesis H2O2 Exciton dissociation Carbon dots Defect engineering
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高温/高压CO2-H2S协同环境下油套管钢的腐蚀机理和材料选择研究 认领 引用
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作者 唐颖 肖立 +5 位作者 李又武 孙景耀 蒋时馨 张越 吴晓丹 白奉田 《材料保护》 CAS CSCD 2026年第2期168-176,共9页
为揭示油套管在高温高压环境CO2、H2S体系中的腐蚀行为及机理,采用高温高压反应釜,对5种商用油套管钢(N80-1钢、L80-1钢、L80-13Cr钢、P110SS钢、P110钢)在极端CO2、H2S条件(450℃、21.00 MPa)下开展动态腐蚀模拟实验,结合... 为揭示油套管在高温高压环境CO2、H2S体系中的腐蚀行为及机理,采用高温高压反应釜,对5种商用油套管钢(N80-1钢、L80-1钢、L80-13Cr钢、P110SS钢、P110钢)在极端CO2、H2S条件(450℃、21.00 MPa)下开展动态腐蚀模拟实验,结合失重法和XRD表征,探讨了极端温压下5种油套管钢分别在CO2及CO2/H2S共存环境中的腐蚀主导机制、产物相变规律,以及温度交变对产物膜稳定性与开裂行为的影响。结果表明:(1)在本文研究的高温高压CO2-H2O体系中,5种油套管钢的腐蚀产物主要物相是FeO,管材的耐腐蚀性能由优至劣排序为P110钢>L80-13Cr钢>P110SS钢>L80-1钢>N80-1钢。水蒸气分压升高可显著提升腐蚀速率(提升77%~371%),其核心机制是在近临界水中离子活性增强及腐蚀产物膜稳定性下降;(2)在高温高压CO2/H2S共存环境(CO2分压2.43 MPa、H2S分压1.21 MPa)中,H2S腐蚀作用占主导,腐蚀产物以Fe7S8为主;5种油套管钢的耐CO2-H2S-H2O腐蚀性能与管材中Cr含量呈正相关,由优至劣排序为:L80-13Cr钢>P110SS钢>N80-1钢>L80-1钢>P110钢。值得注意的是,温度交变(450℃至常温循环)易触发“膜破裂-氢渗透-应力集中”级联效应,导致硫化物应力腐蚀开裂敏感性显著升高,使腐蚀速率倍增(如P110钢从8.11 mm/a增至16.77 mm/a)。(3)L80-13Cr钢因较高的Cr含量(12.331%)有效优化了腐蚀产物膜结构并抑制了氢渗透,在极端CO2和CO2/H2S共存环境中均表现出优异的抗腐蚀性能,是深部热采井筒管材的优选方案。本研究为极端工况下油套管材料的科学选型与腐蚀防护设计提供了重要依据。 展开更多
关键词 油套管钢 高温高压 CO2 H2S 腐蚀产物 腐蚀速率
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双内建电场驱动的D-A COFs/ZnIn2S4 S型异质结加速电荷分离实现纯水中高效光合成H2O2 认领 引用
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作者 郭杰 薛丽君 +3 位作者 宋发辉 李程鹏 陈卓 温丽丽 《物理化学学报》 SCIE CAS CSCD 北大核心 2026年第4期137-150,共14页
构建双内建电场(IEF)驱动的S型异质结为光催化H2O2生产中的高效电荷分离与利用提供了一种极具前景的策略。本文报道了一种基于供体-受体共价有机框架(D-A COFs)TpAQ(由三醛基间苯三酚(Tp)和2,6-二氨基蒽醌(AQ)合成)与ZnIn2S_(4... 构建双内建电场(IEF)驱动的S型异质结为光催化H2O2生产中的高效电荷分离与利用提供了一种极具前景的策略。本文报道了一种基于供体-受体共价有机框架(D-A COFs)TpAQ(由三醛基间苯三酚(Tp)和2,6-二氨基蒽醌(AQ)合成)与ZnIn2S4(ZIS)构筑的双IEF驱动的S型异质结,其中双内建电场分别源自异质结界面和D-A COFs中的D-A界面。值得注意的是,通过同时利用氧还原反应和水氧化反应路径,优化后的TpAQ/ZIS-10在纯水中的可见光驱动产H2O2速率达到2362μmol g−1 h−1,显著高于单一组分TpAQ和ZIS。此外,实验结果与理论计算共同表明,TpAQ/ZIS异质结中双IEF的协同效应显著促进了载流子的传输与分离。本研究为构建具有双IEF的高效S型异质结提供了宝贵见解。 展开更多
关键词 双内建电场 S型异质结 D-A COFs TpAQ/ZIS 光催化产H2O2
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Efficient photocatalytic H2 evolution over SnS2/twinned Mn0.5 Cd0.5 S hetero-homojunction with double S-scheme charge transfer routes 认领 引用 被引量：1
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作者 Zhuonan Lei Wenqi Wang +2 位作者 Tao Sun Enzhou Liu Ting Gao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第13期81-92,共12页
Effective separation of bulk phase and surface charges is crucial for maximizing charge utilization in the process of photocatalytic energy conversion.In this study,SnS2 nanoflowers and twinned Mn0.5 Cd0.5 S ... Effective separation of bulk phase and surface charges is crucial for maximizing charge utilization in the process of photocatalytic energy conversion.In this study,SnS2 nanoflowers and twinned Mn0.5 Cd0.5 S solid solution(T-MCS)nanoparticles were fabricated by a one-step solvothermal method respectively,fol-lowed by the formation of SnS2/T-MCS nanohybrids through a facile physical solvent evaporation process for high-efficiency photocatalytic hydrogen(H2)production.The T-MCS crystal structure consists of alter-nating wurtzite Mn0.5 Cd0.5 S(WZ-MCS)and zinc blende Mn0.5 Cd0.5 S(ZB-MCS),forming a twin structure within the semiconductor.The charge migration mechanism between WZ-MCS and ZB-MCS follows the S-scheme pathway owing to slight differences in energy levels within their respective crystal structures,resulting in exceptional bulk phase charge separation capacity of T-MCS.Additionally,SnS2 enhances the electrochemical performance of the catalysts by providing more active sites,reducing charge transfer re-sistance and H2 production overpotential,thereby facilitating faster reaction kinetics.The photoelectro-chemical tests,radical trapping experiments,density functional theory(DFT),and electron paramagnetic resonance spectroscopy(EPR)confirm that the charge transfer path between SnS2 and T-MCS follows an S-type route that accelerates interfacial photo-induced electrons and holes separation while preserving useful charges.The synergistic impact of twinned homojunction and S-type heterojunction in 10 wt.%SnS2/T-MCS composite contributes to a remarkable H2 production rate of 182.82 mmol h-1 g-1,which is 761.8 times higher than that achieved with SnS2 alone(0.24 mmol h-1 g-1),as well as 5.8 times higher than that achieved with T-MCS alone(31.54 mmol h-1 g-1).This study offers novel insights into design-ing highly efficient sulfide photocatalysts specifically targeting solar-driven H2 evolution through a dual S-scheme transfer pathway. 展开更多
关键词 Twinned Mn0.5Cd0.5S SnS2 Homo-Heterojunctions Double S-scheme Photocatalytic H2evolution
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富水烧变岩下伏煤层水与H2S气体复合灾害防治技术 认领 引用
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作者 王海 王世东 +3 位作者 姬中奎 钱自卫 赵凯兴 贺博 《煤炭科学技术》 EI CAS CSCD 北大核心 2026年第6期259-268,共10页
西部侏罗纪煤田烧变岩分布范围广、裂隙发育、富水性强,是西部地区主要含水层,烧变岩水、煤层水和H2S气体等水害与有害气体复合灾害严重威胁煤矿安全掘进和开采。为解决烧变岩含水层下伏煤层水与H2S气体复合灾害问题,分析研究区... 西部侏罗纪煤田烧变岩分布范围广、裂隙发育、富水性强,是西部地区主要含水层,烧变岩水、煤层水和H2S气体等水害与有害气体复合灾害严重威胁煤矿安全掘进和开采。为解决烧变岩含水层下伏煤层水与H2S气体复合灾害问题,分析研究区烧变岩分布及富水性特征,研究煤层水及H2S气体成因,研发烧变岩含水层下伏煤层水与H2S气体复合灾害防治技术,开展煤层水与H2S气体复合灾害探查治理技术示范应用,结合现场监测数据评价强富水烧变岩含水层下伏煤层水与H2S气体复合灾害防治效果。结果表明:研究区2-2煤、3-1煤、4^(-2)煤和5-2煤均存在不同程度烧变,各煤层烧变岩含水层静储量大、富水性强,并接受松散层水和风化基岩水直接补给。2-2煤烧变岩水经下伏岩层垂向裂隙渗入3-1煤层,溶有H2S气体的水溶液溶蚀煤孔隙中碳酸盐类矿物,增大煤的孔隙和裂隙空间,进一步扩大了煤层储水空间。煤层中H2S气体一方面是由2-2煤层自燃时的含硫有机质转化成含硫干酪根及含硫烃类分解生成H2S,另一方面是由处于封闭厌氧环境下3-1煤层中的硫酸盐还原生成H2S,H2S随水流从煤壁逸出。井下定向钻和孔中瞬变电磁精准探明煤层及顶板富水区域,精确划分钻孔中心半径30 m圆柱体空间的富水异常区,地面钻孔注浆有效封堵2-2煤烧变岩与3-1煤层之间的垂向渗流通道,井下超前小导管注浆封堵了煤层及顶板渗流通道,超前疏放钻孔疏干了煤层及顶板岩层水,涌水量由182 m3/h降至6.5 m3/h,水头高度由37 m下降至0.8 m,H2S体积分数由22×10-6降至2.8×10-6,实现了运输巷的安全掘进。 展开更多
关键词 强富水 烧变岩 煤层 H2S气体 复合灾害
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参芪养心汤治疗缺血性心肌病患者的临床疗效及对血清H2S、Ca2+的影响 认领 引用
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作者 张卓珺 沈丽娟 +6 位作者 蓝弘毅 赵佳婧 沈李阳 黄甜甜 张帅 谈晓东 陆曙 《中国实验方剂学杂志》 CAS CSCD 北大核心 2026年第11期210-217,共8页
目的:评价名中医临床验方参芪养心汤治疗缺血性心肌病(ICM)气阴两虚血瘀证患者的临床疗效和对血清硫化氢(H2S)、钙离子(Ca2+)的影响。方法:将64例符合纳入标准的ICM气阴两虚血瘀证患者应用随机数表法分为对照组(32例)和观察组(32... 目的:评价名中医临床验方参芪养心汤治疗缺血性心肌病(ICM)气阴两虚血瘀证患者的临床疗效和对血清硫化氢(H2S)、钙离子(Ca2+)的影响。方法:将64例符合纳入标准的ICM气阴两虚血瘀证患者应用随机数表法分为对照组(32例)和观察组(32例)。所有患者均接受西医常规治疗,观察组在此基础上加用参芪养心汤治疗。比较两组患者治疗前后的中医证候积分、明尼苏达心衰生活质量评分、左心室射血分数(LVEF)、N末端B型利钠肽前体(NT-proBNP)、6 min步行试验(6MWT)、纽约心脏病协会(NYHA)心功能分级、血清H2S和Ca2+水平。结果:研究过程中对照组和观察组各脱落2例,最终对照组和观察组各纳入患者30例。两组患者在年龄、性别、冠心病病程、基础疾病、实验室检查方面差异无统计学意义,资料具有可比性。与本组治疗前比较,治疗后观察组和对照组的中医证候积分、明尼苏达心衰生活质量评分、NT-proBNP均显著下降(P<0.01),LVEF、6MWT、H2S均显著升高(P<0.01),血清Ca2+明显升高(P<0.05)。与对照组治疗后比较,观察组明尼苏达心衰生活质量评分、NT-proBNP明显下降(P<0.05),中医证候积分显著下降(P<0.01),LVEF、6MWT、血清Ca2+明显升高(P<0.05),H2S显著升高(P<0.01),观察组NYHA心功能分级改善程度高于对照组,但差异无统计学意义。结论:参芪养心汤治疗ICM气阴两虚血瘀证患者疗效显著,能明显改善心功能,提高生活质量,其疗效可能与调节血清H2S和Ca2+水平有关。 展开更多
关键词 参芪养心汤 缺血性心肌病 左室射血分数 硫化氢(H2S) 钙离子(Ca2+)
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Effect of H2on 8YSZ Coatings Prepared by Arc Plasma Torch 认领 引用
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作者 Geng Chuanwen Zhao Peng +2 位作者 Su Yi Fan Zihao Wu Xi 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第8期1858-1864,共7页
The thermal barrier coatings(TBCs)are prepared using spraying technique of 8YSZ particles.In this process,H2is often added to the plasma torch discharge system.In order to study the effect of H2content on plasma... The thermal barrier coatings(TBCs)are prepared using spraying technique of 8YSZ particles.In this process,H2is often added to the plasma torch discharge system.In order to study the effect of H2content on plasma discharge,this study emplyed particle velocity capture diagnostics,optical emission spectroscopy,and finite element simulation to validate the relationship between H2content and coating quality.The results indicate that adding H2increases the temperature and velocity of plasma,which in turn improves the efficiency and in-flight velocity of molten 8YSZ particles.However,when the H2/(Ar+H2)is increased to 50%,the instability of arc root disturbs the arc plasma discharge,posing a challenge to maintaining the physical state of the in-flight particles.With an increase in H2flow rate,the coating quality shows a trend of first increasing and then decreasing,with the optimal flow rate ratio being H2/(Ar+H2)=37.5%.The findings of this work can serve as a theoretical guidance and reference for the preparation of TBCs via plasma. 展开更多
关键词 in-flight particles 8YSZ coatings plasma torch H2plasma
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Hydrothermal carbon with abundant oxygen-containing functional groups for photocatalytic H2O2generation in water and seawater 认领 引用
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作者 CHANG Yuhong HAN Xue +5 位作者 ZHANG Yanxia LI Guofang HU Tianjun CHEN Wenwen PEI Linjuan JIA Jianfeng 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第4期160-170,共11页
Photosynthesis of H2O2via sustainable biomass-derived carbon catalysts facilitate the conversion of renewable resources into valuable chemicals.However,the regulatory function of surface functional groups over r... Photosynthesis of H2O2via sustainable biomass-derived carbon catalysts facilitate the conversion of renewable resources into valuable chemicals.However,the regulatory function of surface functional groups over reaction kinetics has not been sufficiently investigated.Herein,hydrothermal carbon spheres(CS)rich in oxygencontaining functional groups demonstrated a remarkably high H2O2production rate(653μmol/(g·h))in both pure water and actual seawater,even in the absence of any sacrificial agent.Meanwhile,the catalyst demonstrates outstanding activity(92%conversion and>99%selectivity)in the visible-light-driven photocatalytic oxidation of benzylamine to imines.Comprehensive analysis reveals that CS was rich in surface oxygen-containing functional groups,a feature strongly associated with its high photocatalytic efficiency.The observed positive Zeta potential of CS in seawater likely diminished the electrostatic repulsion against the positively charged intermediates,thereby facilitating their accumulation at the liquid-solid interface.This work proposes a strategic framework for developing metal-free photocatalysts from biomass,offering a sustainable pathway for photocatalytic applications. 展开更多
关键词 hydrothermal carbon oxygen functional groups photocatalytic H2O2production benzylamine coupling
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Alkali-cyano dual-tailored g-C3N4/BiOCl S-scheme heterojunctions for highly efficient visible-light-driven H2O2photosynthesis in pure water 认领 引用
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作者 Ziyi Liao Lan Jiang +3 位作者 Yang Yang Lin Wang Weiyou Yang Huilin Hou 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第4期143-161,共19页
Efficient and sustainable photocatalytic hydrogen peroxide(H2O2)synthesis is crucial due to its role as an eco-friendly oxidant and the limitations of conventional industrial methods.Graphitic carbon nitride(g-C... Efficient and sustainable photocatalytic hydrogen peroxide(H2O2)synthesis is crucial due to its role as an eco-friendly oxidant and the limitations of conventional industrial methods.Graphitic carbon nitride(g-C3N4)is a promising photocatalyst but suffers from inefficient charge separation and limited visible light absorption.This study introduces a dual-modified g-C3N4,incorporating Na+/K+ions and cyano groups,coupled with ultrathin BiOCl nanosheets to form an S-scheme heterojunction(CN-NH-NaK/BiOCl).The modification enhances the electronic structure,visible light absorption,and charge separation.The CN-NH-NaK/BiOCl photocatalyst achieved an outstanding H2O2production rate of 33.15 mmol·g-1·h-1under visible light(λ≥400 nm),outperforming pristine g-C3N4(118-fold)and BiOCl(83-fold),and surpassing all previously reported g-C3N4-and BiOCl-based photocatalysts.Even in pure water,the production rate reached 5.18 mmol·g-1·h-1,exceeding that of most previously reported catalysts.Comprehensive characterization revealed an efficient S-scheme charge transfer mechanism,enabling selective 2e-oxygen reduction reaction(94.06%selectivity)and water oxidation.The heterojunction demonstrated excellent stability,reusability,and enhanced degradation of tetracycline hydrochloride.This work provides a promising strategy for advanced S-scheme photocatalysts in sustainable H2O2production and environmental remediation. 展开更多
关键词 S-scheme heterojunction H2O2pHotosyntHesis g-C3N4 BiOCl
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