Electronegativity-assisted optimized electronic structure of functionalized-Pt catalysts for boosting oxygen reduction kinetics  

作　　者：Jin Long Kai-Wen Zhuang Wei Liao Yan An Bin Wang Chen-Zhong Wu Jian-Xin Cao Qing Wang Jun-Song Chen Qing-Mei Wang 

机构地区：[1]Guizhou University Key Laboratory of Green Chemical and Clean Energy Technology,School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China [2]Guizhou University Engineering Research Center of Effcient Utilization for Industrial Waste,Guizhou University,Guiyang 550025,China [3]Institute of Dual-Carbon and New Energy Technology Innovation and Development of Guizhou Province,Guiyang 550025,China [4]Department of Dermatology,West China Hospital,Sichuan University,Chengdu610041,China [5]Institute for Catalysis,Hokkaido University,Sapporo 001-0021,Japan [6]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 611731,China [7]Interdisciplinary Materials Research Center,Institute for Advanced Study,Chengdu University,Chengdu 610106,China

出　　处：《Rare Metals》2024年第5期1965-1976,共12页稀有金属（英文版）

基　　金：financially supported by the Natural Science Foundation of China(Nos.22169005,22068009 and22262006);the Natural Science Special Foundation of Guizhou University(Nos.202017 Special Post A and 702775203301);the Science and Technology Support Project of Guizhou Provincial Science and Technology Department(Nos.ZK[2023]050,ZK[2023]403);The Open Project of Institute of Dual-carbon and New Energy Technology Innovation and Development of Guizhou Province(No.DCRE-2023-06)。

摘　　要：Opportunity to harmonize aspects of oxygen reduction reaction(ORR)performance and structure,and morphology,as well as composition,is urgent for the commercialization of proton exchange membrane fuel cells.Herein,we demonstrate the design and synthesis of a functionalized-supported-Pt catalyst(Pt@HNC)featuring a hollow nitrogen-modified dodecahedral carbon substrate obtained by a stress-induced-shrink tailoring route.The as-obtained Pt@HNC catalyst possesses enhanced ORR per-formance,in particular with half-wave potential,mass activity(MA)and specific activity,which greatly exceed the commercial Pt/C.The density functional theory(DFT)calculations further confirmed that the charge redistribution induced by the electronegativity differences improved the electron interaction between Pt and HNC support.The optimized electronic structure of Pt weakens the reaction energy barrier on the Pt@HNC surface and adsorption of^(*)OH species,thus cooperatively improving the intrinsic activity toward ORR.Additionally,our work indeed provides a guide for the future design of functional nanomaterials in the field of catalysts and clean energy.

关 键 词：Proton exchange membrane fuel cell(PEMFC) Oxygen reduction catalysis Supported Pt-based catalyst Stability 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ426[化学工程]