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Chemcial Industry and Engineering 2024, Vol. 41 Issue (5) :51-60    DOI: 10.13353/j.issn.1004.9533.20242022
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Electrodeposited highly active and stable Ni-Fe alloy electrodes towards oxygen evolution reaction
LI Yue, MIN Luofu, ZHANG Wen, XU Li, WANG Yuxin
State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China

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Abstract We prepared porous nickel-iron alloy electrodes for alkaline water electrolysis oxygen evolution reaction (OER) by electrodeposition on a commercial nickel mesh. By regulating the quality of electrodeposition and the concentration of metal ions in the plating solution to change the deposition layer morphology, catalytic performance, and stability of the electrode catalyst, a multi-stage porous dendritic morphology plating was prepared. At a current density of 10 mA·cm-2, the electrode OER overpotential was only 250 mV, and the Tafel slope was only 35.8 mV·dec-1. The catalytic activity exceeded that of the commercial Ir catalyst, and the Cdl value reached 14.43 mF·cm-2, which was 10 times that of the blank Ni mesh, providing excellent OER catalytic activity with a large electrochemical active area. Meanwhile, the porous morphology constructed by electrodeposition reduced the reaction resistance, and the Rct value of the NiFe alloy electrode (0.32 Ω) was much smaller than that of the Ir/Ni electrode (1.51 Ω), which possessed faster catalytic reaction kinetics. Under the conditions of 80 ℃, 30% KOH and 500 mA·cm-2 current density, the stable operation of water electrolysis for 75 h did not show any significant degradation, which demonstrated good stability.
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LI Yue
MIN Luofu
ZHANG Wen
XU Li
WANG Yuxin
Keywordsalkaline water electrolysis   nickel-iron alloy   electrode materials   oxygen evolution reaction     
Received 2024-03-20;
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LI Yue, MIN Luofu, ZHANG Wen, XU Li, WANG Yuxin.Electrodeposited highly active and stable Ni-Fe alloy electrodes towards oxygen evolution reaction[J]  Chemcial Industry and Engineering, 2024,V41(5): 51-60
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