Construction of a ruthenium-doped CoFe-layered double hydroxide as a bifunctional electrocatalyst for overall water splitting

In this study, ruthenium-doped CoFe-based layered double hydroxides on Ni foam (CoFe-ZLDH/Ru@NF) were fabricated via an etching-precipitation strategy. The resultant CoFe-ZLDH/Ru@NF exhibited excellent activity, showing low overpotentials of 219.8 mV and 60.9 mV to reach the current density of 10 mA...

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Published in:Chemical communications (Cambridge, England) England), 2023-10, Vol.59 (79), p.1183-1186
Main Authors: Ning, Wenxin, Wang, Rui, Li, Xiaoxia, Wang, Ming Hua, Xu, Hao Guan, Lin, Hao Yang, Fu, Xiao Peng, Wang, Mengmin, Liu, Peng Fei, Yang, Hua Gui
Format: Article
Language:English
Subjects:
Anion exchanging
Current density
Electrocatalysts
Hydrogen evolution reactions
Hydrogen production
Hydroxides
Metal foams
Oxygen evolution reactions
Ruthenium
Water splitting
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Summary:In this study, ruthenium-doped CoFe-based layered double hydroxides on Ni foam (CoFe-ZLDH/Ru@NF) were fabricated via an etching-precipitation strategy. The resultant CoFe-ZLDH/Ru@NF exhibited excellent activity, showing low overpotentials of 219.8 mV and 60.9 mV to reach the current density of 10 mA cm −2 for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. As a bifunctional electrocatalyst, it was assembled in an anion exchange membrane water electrolyser (AEMWE) unit, performing as an anode and cathode simultaneously, which only required a cell voltage of 2.33 V to accomplish the industrial level current density of 1 A cm −2 and operated steadily for over 12 h, making it promising for utilization in hydrogen production. Ru-doped CoFe-based layered double hydroxides in situ grown on Ni foam were fabricated by an etching-precipitation strategy, boosting bifunctional water splitting efficiently.
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc03260d