Advanced heterostructure of Pd nanosheets@Pt nanoparticles boosts methanol electrooxidation

查看全文 作　　者：Jie [1]Li;Cheng [1]Wang;Yuefan [1]Zhang;Shinichi [3]Hata;Kewang [1]Zhang;Changqing [2]Ye;Yukihide [3]Shiraishi;Yukou [1,4]Du 机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,Jiangsu,China;[2]Jiangsu Key Laboratory for Environment Functional Materials,School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China;[3]Department of Applied Chemistry,Faculty of Engineering,Sanyo-Onoda City University,Sanyo-Onoda,Yamaguchi 756-0884,Japan;[4]School of Optical and Electronic Information,Suzhou City University,Suzhou 215104,Jiangsu,China 出　　处：《Journal of Energy Chemistry》索引2023年第10期,共10页 基　　金：supported by the National Natural Science Foundation of China(Grant numbers 52274304,52073199)。 摘　　要：Heterostructures have emerged as elaborate structures to improve catalytic activity owing to their combined surface and distinct inverse interface.However,fabricating advanced nanocatalysts with facetdependent interface remains an unexploited and promising area.Herein,we render the controlled growth of Pt nanoparticles(NPs)on Pd nanosheets(NSs)by regulating the reduction kinetics of Pt^(2+)with solvents.Specifically,the fast reduction kinetic makes the Pt NPs uniformly deposited on the Pd NSs(U-Pd@Pt HS),while the slow reduction kinetic leads to the preferential growth of Pt NPs on the edge of the Pd NSs(E-Pd@Pt HS).Density functional theory calculations demonstrate that Pd(111)-Pt interface in U-Pd@Pt HS induces the electron-deficient status of Pd substrates,triggering the d-band center downshift and amplifying the Pd-Pt intermetallic interaction.The synergy between the electronic effect and interfacial effect facilitates the removal of poisonous intermediates on U-Pd@Pt HS.By virtue of the Pd NSs@Pt NPs interface,the heterostructure achieves exceptional methanol oxidation reaction activity as well as improved durability.This study innovatively proposes heterostructure engineering with facetdependent interfacial modulation,offering instructive guidelines for the rational design of versatile heterocatalysts. 关 键 词：Heterostructure engineering Facet-dependent interfacial modulation Methanol oxidation reaction