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The promoting effect of interstitial hydrogen on the oxygen reduction performance of PtPd alloy nanotubes for fuel cells

查看全文 作　　者：Tingting [1]Chao;Xuan [2]Luo;Mengzhao [1]Zhu;Yanmin [1]Hu;Yida [3]Zhang;Yunteng [1]Qu;Hantao [4]Peng;Xiaoshuang [5]Shen;Xusheng [3]Zheng;Liang [2]Zhang;Xun [1]Hong 高影响力作者 机构地区：[1]Center of Advanced Nanocatalysis(CAN),Department of Applied Chemistry,University of Science and Technology of China,Hefei 230026,China;[2]Country Center for Combustion Energy and School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China;[3]National Synchrotron Radiation Laboratory(NSRL),University of Science and Technology of China,Hefei 230029,China;[4]Department of Chemical Physics,University of Science and Technology of China,Hefei 230026,China;[5]School of Physical Science and Technology,Yangzhou University,Yangzhou 225002,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第2期,共7页高影响力期刊 基　　金：supported by the National Key R&D Program of China(Nos.2017YFA0700104 and 2018YFA0702001);the National Natural Science Foundation of China(No.21871238);the Fundamental Research Funds for the Central Universities(No.WK2060000016);the Youth Innovation Promotion Association of the Chinese Academy of Science(No.2018494);the Hefei National Laboratory for Physical Sciences at the Microscale(No.KF2020107). 摘　　要：Highly efficient and stable oxygen reduction reaction(ORR)electrocatalysts are remarkably important but challenging for advancing the large-scale commercialization of practical proton exchange membrane fuel cells(PEMFCs).In this work,we report that the introduction of interstitial hydrogen atoms into PtPd nanotubes can significantly promote ORR performance without scarifying the durability.The enhanced mass activity was 8.8 times higher than that of commercial Pt/C.The accelerated durability test showed negligible activity attenuation after 30,000 cycles.Additionally,H2/O2 fuel cell tests further verified the excellent activity of PtPd-H nanotubes with a maximum power density of 1.32 W·cm^(−2),superior to that of commercial Pt/C(1.16 W·cm^(−2)).Density functional theory calculations demonstrated the incorporation of hydrogen atoms gives rise to the broadening of Pt d-band and the downshift of d-band center,which consequently leads to the weaker intermediates binding and enhanced ORR activity. 关 键 词：hydrogen atoms incorporation ALLOY d-band structure regulation oxygen reduction reaction fuel cell
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