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ChemPhysMater 2024年第2期3卷 143-156页

作者： Zihao Wan Feng Liu Hongfei Xu Shuaili Zhao Zhen An Zizai Ma Zhonghua Zhang Yun Wu Xiaoguang Wang Laboratory of Advanced Materials and Energy Electrochemistry Institute of New Carbon MaterialsCollege of Material Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Datong Innoreagen Power Technology Co. LtdDatong 037000China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan250061China Department of Materials Science and Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China

Proton exchange membrane fuel cells(PEMFCs),which have the advantages of high-power density,zero emission,and low noise,are considered ideal electrochemical conversion systems for converting hydrogen(H2)and oxy-gen(O_(2))/air into ***,the oxygen reduction reaction(ORR),which is accompanied by multiple electrons,results in voltage loss and low conversion efficiency of ***,PEMFCs mainly use high-load precious platinum(Pt)to promote the ORR process;however,the high cost of Pt hinders the widespread commercialization of *** the past few years,metal-nitrogen-carbon single-atom catalysts(M-N-C SACs)have attracted considerable attention and have been recognized as potential Pt-based catalysts owing to their outstanding ORR *** review briefly introduces the components of ***,we discuss the catalytic mechanisms of the M-N-C SACs for the ***,the latest advances in noble,non-noble,and heteroatom-doped M-N-C SACs used as ORR and PEMFCs cathode catalysts are systematically *** sum-mary,we have outlined the current challenges and proposed a future perspective of M-N-C SACs for PEMFCs cathodes.

关键词： Proton exchange membrane fuel cells Oxygen reductionreaction Cathode platinum-based catalysts Metal-nitrogen-carbon single-atom catalysts

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Depositing the PtNi nanoparticles on niobium oxide to enhance the activity and CO-tolerance for alkaline methanol electrooxidation

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Chinese Journal of Structural Chemistry 2023年第11期42卷 25-31页

作者： Xinyi Hu Riguang Zhang Zhao Jiang Department of Chemical Engineering Shaanxi Key Laboratory of Energy Chemical Process IntensificationEngineering Research Center of New Energy System Engineering and Equipment Xi'an Jiaotong UniversityXi'an710049China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan030000China

Direct methanol fuel cells have the advantages of simple system,convenient operation,high conversion rate and low carbon emission,which are considered as the environmental and friendly energy conversion ***-ever,the low activity,CO-tolerance and high cost of anode catalysts restrict the large-scale commercial ***,it is of great practical significance to design and construct the anodic catalysts with high activity,stability and low cost for methanol oxidation *** this work,the PtM/Nb_(2)O_(5)-C(M=Co,Sn,Ni)catalysts are synthesized by the ethylene glycol solvothermal method using transition metal oxide Nb_(2)O_(5)as the *** catalytic performance of different catalysts is further evaluated for alkaline *** results show that the introduction of Ni(existing in Ni^(2+)and Ni^(3+))has the most obvious improvement for alkaline MOR *** adjusting the doped ratio of Pt:Ni,it is shown that PtNi/Nb_(2)O_(5)-C has the highest mass activity(3877.9 mA-mg_(pt)^(-1)),12 times that of the commercial Pt/C ***,LSV,Tafel and EIS analyses show that PtNi/Nb_(2)O_(5)-C has the lowest onset potential and charge transfer resistance,and the fastest electrocatalytic oxidation rate of *** tests show that the electrochemical stability is also significantly improved with the introduction of Nb_(2)O_(5)and *** with the structural characterization and electrochemical tests,it is found that the evident electronic effect among Pt and Ni,Nb_(2)O_(5)and the hydroxyl brought from Ni species are mainly ascribed for enhancing the activity,CO resistance and stability of PtNi/Nb_(2)O_(5)-C.

关键词： Direct methanol fuel cell Niobium oxide platinum-based catalysts Methanol oxidation reaction

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调控超细高熵合金晶格应变用于高活性和高稳定性甲醇氧化

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Science China Materials 2021年第10期64卷 2454-2466页

作者：王东东陈志文黃裕呈李巍王娟卢琢乐顾开智王特华吴雨洁陈晨张怡琼黄小青陶李董崇禮陈俊 Chandra Veer Singh 王双印 State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082 Department of Materials Science and Engineering University of TorontoToronto ON M5S 3E4 College of Materials Science and Engineering Changsha University of Science&TechnologyChangsha 410114 ARC Centre of Excellence for Electromaterials Science Intelligent Polymer Research Institute(IPRI)Australian Institute of Innovative Materials(AIIM)University of WollongongWollongong NSW 2522 Research Center for X-Ray Science&Department of Physics Tamkang UniversityNew Taipei City 25137 College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123

高熵合金(HEAs)因其非常规的组成和独特的物理化学性质而得到广泛研究.本文,我们首次提出了一种表面应变策略来调控HEAs的电子结构用于高效的甲醇电氧化反应(MOR).高分辨像差校正扫描透射电子显微镜(STEM)和元素分布分析表明,在Pt Fe Co... 详细信息

高熵合金(HEAs)因其非常规的组成和独特的物理化学性质而得到广泛研究.本文,我们首次提出了一种表面应变策略来调控HEAs的电子结构用于高效的甲醇电氧化反应(MOR).高分辨像差校正扫描透射电子显微镜(STEM)和元素分布分析表明,在Pt Fe CoNi Cu HEAs中各原子分散均匀,并形成FCC晶体结构.700℃热处理所得HEA-700的压缩应变比400℃热处理所得HEA-400的压缩应变高0.94%.正如预期,HEA-700的比活性和质量活性远超HEA-400和目前大多数最先进的催化剂.MOR活性的增强归因于压缩应变导致HEA-700中Pt–Pt键距缩短.同时,核中的非贵金属原子通过转移电子到表面Pt层产生压缩应变和d带中心的下移.这项工作为高性能HEAs电催化剂的设计提供了一个新的视角.

关键词： high-entropy alloys lattice strain methanol oxidation platinum-based catalysts electrocatalysis

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