期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 28, 页码 13674-13682出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.02.117
关键词
Hydrogen evolution reaction; Rhodium; Ni(OH)(2); Bifunctional catalysts; Alkali-active catalysts
资金
- National Natural Science Foundation of China [51901184]
- Natural Science Foundation of Shaanxi Province [2021JM-061]
The study demonstrates that Rh and Ni(OH)(2) exhibit synergistic effect in Rh-Ni(OH)(2)/C nanocomposites, with the best performance observed when the molar ratio of Rh to Ni(OH)(2) is 1:1, showing superior HER activity and durability.
Pt group metals display lower HER activity in alkaline solution than in acidic solution, because they are inefficient in the water dissociation step (Volmer step). Compared with Pt, the activity difference of Rh in alkaline and acidic media is much smaller. Meanwhile, Ni(OH)(2) is proved to be an effective catalyst for water dissociation. Therefore, Rh-Ni(OH)(2)/ C nanocomposites with different Rh:Ni(OH)(2) ratios were synthesized by a co-deposition/ partial reduction method, and their microstructures as well as electrocatalytic properties were studied. The results show that Rh and Ni(OH)(2) display synergistic effect in Rh-Ni(OH)(2)/C nanocomposites. The Rh-Ni(OH)(2)/C nanocomposite with a molar ratio of Rh to Ni(OH)(2) of 1:1 exhibits the highest activity. It shows an overpotential of 36 mV at 10 mA cm(-2) anda Tafel slope of 32 mV dec(-1) for HER in alkaline media, which is superior to commercial Pt/C. In addition, the Rh-Ni(OH)(2)/C (1:1) nanocomposite shows excellent durability in alkaline media as well. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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