In situ electrochemical synthesis of atomically dispersed metal sites for efficient hydrogen evolution reaction  

作　　者：Tingting Liu Zonghua Pu Zhangsen Chen Mingjie Wu Yongpeng Xia Sixiang Liu Ning Chen Weifeng Chen Lei Zhang Zhangxing Chen Gaixia Zhang Shuhui Sun 

机构地区：[1]Institut National de la Recherche Scientifique(INRS),Center Energie Materiaux Telecommunications,Varennes,Quebec,Canada [2]Department of Electrical Engineering,Ecole de Technologie Superieure(ETS),Montreal,Quebec,Canada [3]Canadian Light Source(CLS),Saskatoon,Saskatchewan,Canada [4]Energy,Mining and Environment,National Research Council of Canada,Vancouver,British Columbia,Canada [5]Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,Alberta,Canada

出　　处：《SusMat》2024年第6期41-50,共10页可持续发展材料(英文)

基　　金：The Natural Sciences and Engineering Research Council of Canada。

摘　　要：The development of efficient and robust non-Pt and low-Pt catalysts with equivalent or even superior performance to commercial Pt-based catalysts for hydrogen evolution reaction(HER)is highly desired,but challenging,in the field of water electrolysis.Herein,we report a facile and cost-effective in situ electrochemical approach for the synthesis of atomically dispersed metal sites including platinum(Pt),ruthenium(Ru),and palladium(Pd)on the polyaniline(PANI)support.The PANI exhibits not only high electrochemical conductivity but also efficientH+capture fromhydronium ions,leading to the formation of protonated amine groups that can be easily electrochemically reduced to H2 on atomically dispersed metal active sites.As an example,the atomically dispersed Pt sites anchored on carbon cloth-supported PANI(PANI-Pt/CC)demonstrate excellent activity and durability toward the HER.The mass activity of PANI-Pt-10/CC reaches 25 A mg_(Pt)^(−1),exhibiting a significant enhancement of 50-fold compared to that of the commercial Pt/C(0.5 A mg_(Pt)^(−1)).Therefore,this study presents a universally applicable approach for the design of atomically dispersed metal sites/conducting polymer heterostructures for highly efficient catalysts toward HER and beyond.

关 键 词：ELECTROCATALYST hydrogen evolution in situ reduction PANI nanofiber single-atom catalyst 

分 类 号：O64[理学—物理化学]