Controllable synthesis of grain boundary-enriched Pt nanoworms decorated on graphitic carbon nanosheets for ultrahigh methanol oxidation catalytic activity  

作　　者：Huajie Huang Yujie Wei Ying Yang Minmin Yan Haiyan He Quanguo Jiang Xiaofei Yang Jixin Zhu 

机构地区：[1]College of Mechanics and Materials,Hohai University,Nanjing 210098,Jiangsu,China [2]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Science,Nanjing Forestry University,Nanjing 210037,Jiangsu,China [3]Institute of Advanced Materials(IAM),Nanjing Tech University,Nanjing 211816,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2021年第6期601-609,I0014,共10页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(51802077,21975129);the Fundamental Research Funds for the Central Universities(2019B16214);China Postdoctoral Science Foundation(2016 T90414);Jiangsu Planned Projects for Postdoctoral Research Funds(1601026A)。

摘　　要：Although one-dimensional Pt nanocrystals have long been regarded as ideal electrode catalysts for fuel cells,the synthetic techniques commonly involve the use of various complicated templates or surfactants,which have largely hampered their large-scale industrial application.Herein,we present a convenient and cost-effective approach to the stereoassembly of quasi-one-dimensional grain boundary-enriched Pt nanoworms on nitrogen-doped low-defect graphitic carbon nanosheets(Pt NWs/NL-CNS).Benefiting from its numerous catalytically active grain boundaries as well as optimized electronic structure,the as-derived Pt NWs/NL-CNS catalyst possesses exceptionally good electrocatalytic properties for methanol oxidation,including an ultrahigh mass activity of 1949.5 mA mg^(-1), reliable long-term durability,and strong poison tolerance,affording one of the most active Pt-based electrocatalysts for methanol oxidation reaction.Density functional theory calculation further reveals that the formation of worm-shape Pt morphology is attributed to the modified electronic structure as well as controllable defect density of the carbon matrix,which could also weaken the adsorption ability of Pt towards CO molecule and meanwhile synergistically promotes the catalytic reaction kinetics.

关 键 词：Platinum nanoworm Nitrogen doping Low defect Carbon nanosheet Methanol oxidation 

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]