文献类型：期刊文献

英文题名：Controlled Aggregation of Cobalt and Platinum Atoms via Plasma Treatment for Exceptional Hydrogen Evolution Reaction Activity

作者：Zhang, Guoqing[1];Li, Jiankun[1];Wang, Yixing[1,2];Lei, Linfeng[1,2];Zhuang, Linzhou[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Suzhou 215000, Peoples R China

年份：2024

卷号：14

期号：12

外文期刊名：COATINGS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001383816800001)】；

基金：This research was funded by National Natural Science Foundation of China, and grant number include 22378119, 22075076, and 22208092.

语种：英文

外文关键词：hydrogen evolution reaction; plasma; intermetallic compounds; controlled aggregation

摘要：Designing and developing highly active, stable, and cost-effective hydrogen evolution reaction (HER) catalysts is crucial in the field of water electrolysis. In this study, we utilize N-doped porous carbon (CoNC) derived from zeolite imidazole metal-organic frameworks (ZIF-67) as support and prepare CoNC-Pt-IM-P via chemical impregnation (CoNC-Pt-IM) and plasma treatment. Systematic analyses reveal that calcined CoNC with pyridinic nitrogen could serve as a robust support to strongly anchor PtCo nanoclusters, while argon plasma treatment could lead to a noticeable aggregation of Co and Pt atoms so as to alter the electronic environment and enhance intrinsic HER catalytic activity. CoNC-Pt-IM-P could exhibit outstanding catalytic activity toward HER, achieving an exceptionally low overpotential of 31 mV at the current density of -10 mA cm-2 and a Tafel slope of 36 mV dec-1. At an overpotential of 50 mV, its mass activity reaches 4.90 A mgPt-1, representing enhancements of 1.5 times compared to CoNC-Pt-IM and 12.3 times compared to commercial 20 wt% Pt/C. Furthermore, it could operate stably for over 110 h at a current density of -10 mA cm-2, demonstrating its exceptional durability. This work uses plasma treatment to achieve the controllable aggregation of Co and Pt atoms to enhance their catalytic activity, which has the advantage of avoiding excessive particle aggregation compared to the commonly used method of high-temperature calcination.