期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 97, 页码 40849-40859出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.09.200
关键词
Electrodeposition; Oxygen evolution reaction; Phosphide; Sulfide; Nickel; Iron
资金
- Shaanxi University of Science and Technology Scientific Research Foundation [2019QNBJ-05]
- Natural Science Foundation of Shaanxi Province of China [2021JQ-540, 2018JM2036]
- China Postdoctoral Science Foundation [2020M683666XB]
- Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science and Technology, China [KFKT2022-12]
- Open Foundation of Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology [KFKT2022-12]
Inexpensive and efficient electrocatalysts for oxygen evolution reaction (OER) are prepared using a simple aqueous electrodeposition method. The Ni-Fe-S film exhibits the highest OER activity and the most favorable kinetics, while the Ni-Fe-P film shows higher intrinsic OER activity. The results provide insights into the design of cost-effective OER electrocatalysts.
The preparation of inexpensive and efficient electrocatalysts for oxygen evolution reaction (OER) is crucial in the widespread application of water electrolyzers. A simple one-step aqueous electrodeposition method is utilized to prepare amorphous nickel-iron sulfide (Ni-Fe-S) and phosphide (Ni-Fe-P) films on Ni foam. The deposited films are highly porous, and can convert to active electrocatalysts for OER. In 1 M KOH, the Ni-Fe-S shows the highest OER activity, and requires only 230 mV overpotential to reach 0.05 A cm-2 OER current densities. The Fe-Ni-S also sustains the 30 h 0.05 A cm-2 galvanostatic OER test. Ex-situ characterizations show that sulfur in the Fe-Ni-S is oxidized and leached into the solution during OER, and that (oxy)hydroxide layer is formed at the surface. The adsorption energy of the hydroxyl group, an OER intermediate, is tuned by the electron interaction between the Ni and Fe, and the Ni-Fe-S exhibits the optimum hydroxyl group adsorption energy and the most facile OER kinetics. Also, higher intrinsic OER activity is observed for the electrodeposited amorphous nickel phosphide-derived film than the amorphous nickel sulfide-derived film. (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