Multimetallic AuPd@Pd@Pt core-interlayer-shell icosahedral electrocatalysts for highly efficient oxygen reduction reaction

查看全文 作　　者：Qingfeng [1]Xu;Wenlong [2]Chen;Yucong [1]Yan;Zhemin [1]Wu;Yi [1]Jiang;Junjie [1]Li;Ting [1]Bian;Hui [1]Zhang;Jianbo [2]Wu;Deren [1]Yang

机构地区：[1]State Key Laboratory of Silicon Materials, School of Materials Science & Engineering, Zhejiang University;[2]State Key Laboratory of Metal Complex Matrix, School of Materials Science & Engineering, Shanghai Jiao Tong University

出　　处：《Science Bulletin》索引2018年第63卷第8期,共8页

基　　金：supported by the National Natural Science Foundation of China(51372222 and 51522103);National Program for Support of Top-notch Young Professionals;the Fundamental Research Funds for the Central Universities(2015XZZX004-23);the Thousand Talents Program for Distinguished Young Scholars(JBW)from the National Natural Science Foundation of China;Start-up Fund(JBW)from Shanghai Jiao Tong University 摘　　要：Incorporating Pt with core metals into Pt-based core-shell catalysts is regarded as a promising strategy to substantially enhance the catalytic properties towards oxygen reduction reaction(ORR) in fuel cells due to the synergetic effect between distinct metals. In this wok, ultrathin Pt skins with two atomic layers were epitaxially coated on as-prepared icosahedral Au_50Pd_50, Au_60Pd_40 and Au_66Pd_34 nanocrystal seeds,which are constructed with alloyed cores and Pd shells with different thickness. Through electron microscopic characterizations, Pd interlayers with tunable thickness of 3, 6, and 12 atomic layers can be found in the Au_66Pd_34@Pt, Au_60 Pd_40@Pt and Au_50Pd_50@Pt icosahedra, respectively. These icosahedral Au Pd@Pd@Pt nanocrystals show substantially enhanced activities and durabilities in electrocatalytic measurements towards ORR compared to Au_75Pd_25@Pt icosahedra without Pd interlayer and commercial Pt/C catalysts. Specifically, Au_60Pd_40@Pt icosahedra with 6 atomically thick Pd interlayer display the best electrocatalytic performances, whose mass activities before and after durability tests of 50,000 cycles are11.6 and 30.2 times, respectively, as high as that of the commercial Pt/C. 关键词：反应耐久性测试氧 PT/C 原子层催化性质催化剂 PD

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Multimetallic AuPd@Pd@Pt core-interlayer-shell icosahedral electrocatalysts for highly efficient oxygen reduction reaction

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