Electronically Modulated FeNi Composite by CeO₂ Porous Nanosheets for Water Splitting at Large Current Density

Authors

Ming-Yu Ding, Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Nanning 530004, China
Wen-Jie Jiang, Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Nanning 530004, China
Tian-Qi Yu, Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Nanning 530004, China
Xiao-Yan Zhuo
Xiao-Jing Qin, Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Nanning 530004, China
Shi-Bin Yin, Guangxi Key Laboratory of Electrochemical Energy Materials, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi Nanning 530004, ChinaFollow

Corresponding Author

Shi-Bin Yin(yinshibin@gxu.edu.cn)

Abstract

Exploiting highly active and non-noble metal bifunctional catalysts at large current density is significant for the advancement of water electrolysis. In this work, CeO₂ electronically structure modulated FeNi bimetallic composite porous nanosheets in-situ grown on nickel foam (NiFe₂O₄-Fe₂₄N₁₀-CeO₂/NF) is synthesized. Electrochemical experiments show that the NiFe₂O₄-Fe₂₄N₁₀-CeO₂/NF exhibited the outstanding activities toward both oxygen and hydrogen evolution reactions (OER and HER) (η₁₀₀₀ = 352 mV and η₁₀₀₀ = 429 mV, respectively). When assembled into a two-electrode system for overall water splitting (OWS), it only needs a low cell voltage of 1.81 V to drive 100 mA·cm⁻². And it can operate stably at ±500 mA·cm^-2 over 30 h toward OER, HER and OWS without significant activity changes. The reason could be assigned to the electronic modulating of CeO₂ on FeNi composite, which can boost the intrinsic activity and optimize the adsorption of reaction intermediates. Moreover, the porous nanosheets in-situ grown on NF could enhance the contact of active site with electrolyte and facilitate the gas release, thus improving its chemical and mechanical stabilities. This study highlights a novel approach to design bifunctional non-noble metal catalysts for water splitting at large current density.

Graphical Abstract

Keywords

FeNi composite; hydrogen evolution reaction; oxygen evolution reaction; catalyst; water splitting

DOI Link

https://doi.org/10.13208/j.electrochem.2208121

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2023-05-28

Online Available Date

2022-11-21

Revised Date

2022-09-19

Received Date

2022-08-12

Recommended Citation

Ming-Yu Ding, Wen-Jie Jiang, Tian-Qi Yu, Xiao-Yan Zhuo, Xiao-Jing Qin, Shi-Bin Yin. Electronically Modulated FeNi Composite by CeO₂ Porous Nanosheets for Water Splitting at Large Current Density[J]. Journal of Electrochemistry, 2023 , 29(5): 2208121.
DOI: 10.13208/j.electrochem.2208121
Available at: https://jelectrochem.xmu.edu.cn/journal/vol29/iss5/2