面向碱性析氢反应的原子级优化Fe-Pt金属间化合物催化剂表面终结态探索  

Atom-by-atom optimizing the surface termination of Fe-Pt intermetallic catalysts for alkaline hydrogen evolution reaction

作　　者：梁庆 孟繁玲 李文文 邹旭 宋可心 葛昕 姜周 刘玉华 刘美琦 李振宇 董韬文 陈中军 张伟 郑伟涛 Qing Liang;Fanling Meng;Wenwen Li;Xu Zou;Kexin Song;Xin Ge;Zhou Jiang;Yuhua Liu;Meiqi Liu;Zhenyu Li;Taowen Dong;Zhongjun Chen;Wei Zhang;Weitao Zheng(Key Laboratory of Automobile Materials(Ministry of Education),School of Materials Science and Engineering,Electron Microscopy Center,International Center of Future Science,Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials,Jilin University,Changchun 130012,China;Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Key Laboratory of Automobile Materials(Ministry of Education),School of Materials Science and Engineering,Electron Microscopy Center,International Center of Future Science,Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials,Jilin University,Changchun 130012,China [2]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science Bulletin》2024年第8期1091-1099,共9页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51872115 and 52101256);Beijing Synchrotron Radiation Facility(BSRF)4B9A。

摘　　要：Controlling the atomic arrangement of elemental atoms in intermetallic catalysts to govern their surface and subsurface properties is a crucial but challenging endeavor in electrocatalytic reactions.In hydrogen evolution reaction(HER),adjusting the d-band center of the conventional noble-metallic Pt by introducing Fe enables the optimization of catalytic performance.However,a notable gap exists in research on the effective transition from disordered Fe/Pt alloys to highly ordered intermetallic compounds(IMCs)such as FePt_(3)in the alkaline HER,hampering their broader application.In this study,a series of catalysts FePt_(3-x)H(x=5,6,7,8 and 9)supported on carbon nanotubes(CNTs)were synthesized via a simple impregnation method,along with a range of heat treatment processes,including annealing in a reductive atmosphere,to regulate the order degree of the arrangement of Fe/Pt atoms within the FePt_(3)catalyst.By using advanced microscopy and spectroscopy techniques,we systematically explored the impact of the order degree of FePt_(3)in the HER.The as-prepared FePt_(3)-8H exhibited notable HER catalytic activity with low overpotentials(η=37 mV in 1.0 mol L^(-1)KOH)at j=10 mA cm^(-2).The surface of the L1_(2)FePt_(3)-8H catalyst was demonstrated to be Pt-rich.The Pt on the surface was not easily oxidized due to the unique Fe/Pt coordination,resulting in significant enhancement of HER performance.

关 键 词：INTERMETALLIC Hydrogen evolution reaction Surface CATALYST 

分 类 号：TQ426[化学工程]