Enhanced ORR performance of Pt catalysts in acidic media by coupling with topological C defects  

作　　者：Yan Dong Yuan Wang Ziqi Tian Kemin Jiang Yanle Li Yichao Lin Colin W.Oloman Elod L.Gyenge Jianwei Su Liang Chen 

机构地区：[1]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Department of Chemical and Biological Engineering,Clean Energy Research Center(CERC),The University of British Columbia,Vancouver V6T 1Z3,Canada [4]Institutes of Physical Science and Information Technology,Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Ministry of Education),Anhui University,Hefei,Anhui 230601,China

出　　处：《The Innovation》2021年第4期65-71,共7页创新（英文）

基　　金：supported by National Natural Science Foundation of China(nos.52002378 and 51872306);Natural Science Foundation of Zhejiang Provincial(nos.LQ19B030002,LD21E020001,and LY21B030006);the From 0 to 1 Innovative program of CAS(no.ZDBS-LY-JSC021);K.C.Wong Education Foundation(GJTD-2019-13);Ningbo S&T Innovation 2025 Major Special Program(nos.2019B10046,2020Z059,2020Z107,and 2019B10041);Ningbo Natural Science Foundation(no.2019A610019).

摘　　要：Defect engineering is a promising strategy for supported catalysts to improve the catalytic activity and durability.Here,we selected the Cmatrix enriched with topological defects to serve as the substrate material,in which the topological defects can act as anchoring centers to trapPt nanoparticles for driving the O_(2) reduction reactions(ORRs).Both experimental characterizations and theoretical simulations revealed the strong Ptdefect interaction with enhanced charge transfer on the interface.Despite a low Pt loading,the supported catalyst can still achieve a remarkable 55 mV positive shift of half-wave potential toward ORR in O_(2)-saturated 0.1 M HClO_(4) electrolyte compared with the commercial Pt catalyst on graphitized C.Moreover,the degeneration after 5,000 voltage cycles was negligible.This finding indicates that the presence of strong interaction between Pt and topological C defects can not only stabilize Pt nanoparticles but also optimize the electronic structures of Pt/C catalysts toward ORR.

关 键 词：O_(2)reduction reaction Pt-based catalysts topological C defects metal-support interactions proton-exchange-membrane fuel cells 

分 类 号：O64[理学—物理化学]