期刊
NANO RESEARCH
卷 15, 期 5, 页码 3866-3871出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3993-8
关键词
methanol electrooxidation; PtCu3 alloy catalyst; lattice compression; composition reconstruction; heat-treatment
类别
资金
- National Natural Science Foundation of China [51872209, 51972239]
- Key programs for Science and Technology Innovation of Wenzhou [2018ZG005]
In this study, a simple heat-treatment method was used to synthesize a PtCu3/C intermetallic compound catalyst with lattice compression, showing high activity and stability. The high activity towards MOR was attributed to the tightening of the Pt-M bond and the prevention of Cu dissolution by Pt.
Platinum based alloys are hereinto the mostly used methanol oxidation catalysts. However, there are limited ways to improve the methanol oxidation reaction (MOR) performance of catalysts in terms of both activity and stability. Herein we developed a simple heat-treatment method to synthesize PtCu3/C intermetallic compound catalyst with lattice compression. The as-prepared PtCu3/C-1000 exhibited high specific activity of 3.23 mA.cm(-1) and mass activity of 1,200 mA.mg(pt)(-1), which is much higher than the PtCu3/C-untreated and commercial Pt/C catalysts, respectively. The XAS and DFT results shows the high activity of the catalyst towards MOR comes from the tightening of the Pt-M bond, which leads to the decrease of Fermi energy level and the make it difficulty in adsorbing carbon intermediates, thus releasing more active sites to promote the improvement of MOR performance. Moreover, the PtCu3/C-1000 shows better stability which is due to the surface-rich Pt prevents Cu from dissolution.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据