Journal
IONICS
Volume 28, Issue 8, Pages 3945-3956Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-022-04620-5
Keywords
Electrodeposition; Electrocatalyst; Foam nickel; OER; Water splitting
Funding
- General project of Natural Science Foundation of Shanxi Province [20210302123332]
- 1331 Engineering of Shanxi Province
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In this paper, an amorphous composite electrocatalyst was prepared by a simple electrochemical deposition method on nickel foam. The electrocatalyst showed high electrocatalytic activity and stability for oxygen evolution reaction in 1M KOH solution.
In this paper, an amorphous composite electrocatalyst of Co(OH)(2)-Ni(OH)(x)S-y was prepared by a simple and rapid electrochemical deposition method on nickel foam (NF). The electrochemical performance for oxygen evolution reaction (OER) was tested in 1 M KOH solution. The overpotential of Co(OH)(2)-Ni(OH)(x)S-y (Co:Ni = 9:1) electrode was 423 mV at 50 mA cm(-2). The potential of the Co(OH)(2)-Ni(OH)(x)S-y (Co:Ni = 9:1) sample remained essentially unchanged from the initial potential of 1.651 V after 12 h of stability test. In this catalyst, the strong synergistic effect between cobalt and nickel ions, the greatly increased amorphous defect sites and oxygen vacancies, and the abundant electrochemical specific surface area together lead to the increased electrocatalytic activity and high electrocatalyst stability. This amorphous CoNi-based composite electrocatalyst prepared by simple electrodeposition has certain significance for the preparation of hydrogen energy.
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