High stability three-dimensional porous PtSn nano-catalyst for ethanol electro-oxidation reaction  

作　　者：Yue Sun Haiyan Xiang Huimin Li Gang Yu Hong Chen Song Liu 

机构地区：[1]Institute of Chemical Biology and Nanomedicine(ICBN),State Key Laboratory of Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha 410082,China [2]School of Materials Science and Energy Engineering,Foshan University,Foshan 528000,China

出　　处：《Chinese Chemical Letters》2020年第9期2491-2494,共4页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21705036,21975067,51974115,21476066 and 51271074);Natural Science Foundation of Hunan Province,China(No.2018JJ3035);Fundamental Research Funds for the Central Universities from Hunan University。

摘　　要：In addition to the theoretical research,direct ethanol fuel cells have great potential in practical applications.The performance of direct ethanol fuel cells largely depends on the electrocatalysts.Ptbased electrocatalysts have been promising candidates for advancing direct ethanol fuel cells for its high catalytic activity and great durability.Here,a PtSn catalyst with unique three-dimensional porous nanostructure has been designed and synthesized via a two-step liquid phase reduction reaction.Sn formed a self-supporting framework in PtSn alloy particles(~3.5 nm).In ethanol electro-oxidation reaction,the PtSn catalyst exhibited high mass activity and excellent recycling time compared with that of Pt/C.After the morphology characterization before and after potential cycling,the PtSn alloy-based nano-catalyst showed good stability.The PtSn catalysts effectively avoid structural instability due to the external carriers,and prolong the leaching time of Sn.In addition,the introduction of a certain amount of Sn can also solve the poisoning phenomenon of active sites on Pt surface.The design strategy of porous alloy nano-catalyst sheds light on its applications in direct ethanol fuel cells.

关 键 词：PTSN Porous structure Direct ethanol fuel cell Ethanol electro-oxidation STABILITY 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]