文献类型：期刊文献

英文题名：Cobalt-platinum intermetallic composite loaded on pyridinic N-enriched carbon for acidic hydrogen evolution catalysis with ultralow overpotential

作者：Xie, Qiushi[1];Li, Jiankun[1];Wang, Keyu[1];Li, Shiyi[1];Xu, Weiyi[1];Wang, Yixing[1];Lei, Linfeng[1];Li, Siyao[1];Zhuang, Linzhou[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：7

期号：8

起止页码：1607

外文期刊名：MATERIALS CHEMISTRY FRONTIERS

收录：;EI(收录号：20231213750504);WOS:【SCI-EXPANDED(收录号:WOS:000945542100001)】；

基金：Q. X. and J. L. contributed equally to this work. The authors gratefully acknowledge the research funding provided by National Key R&D Program of China (Grant No. 2021YFB3801301), National Natural Science Foundation of China (Grant No. 22075076 and 22005098).

语种：英文

外文关键词：Calcination - Carbon - Cobalt compounds - Doping (additives) - Hydrogen - Intermetallics - Metal nanoparticles - Platinum alloys - Platinum compounds

摘要：Platinum is a highly efficient catalyst for the hydrogen evolution reaction (HER) in acidic media, but its widespread use has been seriously impeded by its scarcity and high cost. Herein, we report the preparation of CoPt3 nanoparticles loaded on N-doped carbon nanosheets (NCS-CoPt) via a simple mixing-calcination strategy. This strategy could simultaneously achieve metal nanosize controlling, heteroatom synergy, and support stabilization. Ar calcination of NCS-CoPt could form intermetallic compound CoPt3, which could be the highly active HER catalytic site, while the H-2/Ar atmosphere with higher reducing ability could decompose the Co-Pt intermetallic compound into non-valent metal nanoparticles at a high temperature (750 degrees C). Meanwhile, for NCS-CoPt, the high content of pyridinic N on the carbon substrate could benefit the strong interaction of the support and CoPt3 nanoparticles and contribute to its robust HER activity and stability. Consequently, NCS-CoPt exhibits an outstanding HER activity in acidic media, requiring an ultralow overpotential of 41 mV to achieve a current density of 10 mA cm(-2). Moreover, its mass activity reaches up to 3.17 A mg(Pt)(-1) at an overpotential of 50 mV, which is 7.9 times that of commercial 20 wt% Pt/C.