Citation: Endong YANG, Haoze TIAN, Ke ZHANG, Yongbing LOU. Efficient oxygen evolution reaction of CuCo₂O₄/NiFe-layered bimetallic hydroxide core-shell nanoflower sphere arrays[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(5): 930-940. doi: 10.11862/CJIC.20230369 shu

Efficient oxygen evolution reaction of CuCo₂O₄/NiFe-layered bimetallic hydroxide core-shell nanoflower sphere arrays

Endong YANG ^{1, 2} ,
Haoze TIAN ³ ,
Ke ZHANG ³ ,
Yongbing LOU ^3,,

1.
Shanghai Yijin Electronic Technology Co., Ltd., Shanghai 200120, China
2.
Nantong Jianghai Energy Storage Technology Co., Ltd., Nantong, Jiangsu 226399, China
3.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China

Corresponding author: Yongbing LOU, lou@seu.edu.cn
Received Date: 8 October 2023
Revised Date: 22 January 2024

Figures(7)

Using an interface engineering strategy, we successfully synthesized a core-shell nano-flower array of CuCo₂O₄/NiFe-layered bimetallic hydroxide (LDH) on nickel foam (NF) (CuCo₂O₄/NiFe-LDH@NF). The research indicates that electrons undergo transfer across the coupled interface of CuCo₂O₄ and NiFe-LDH, resulting in the enrichment of the CuCo₂O₄ core in electron density and thereby enhancing reaction kinetics. The amorphous NiFe-LDH shell not only provides additional channels for electron/material transport and increases active sites but also effectively shields the core CuCo₂O₄ from strong alkali corrosion during the oxygen evolution reaction (OER) in electrocatalysis. Therefore, when employed as an OER catalyst in a 1.0 mol·L^-1 KOH solution, CuCo₂O₄/NiFe-LDH@NF required only a low overpotential of 191 mV to achieve a current density of 10 mA·cm^-2 and a low Tafel slope of 31 mV·dec^-1. Furthermore, CuCo₂O₄/NiFe-LDH@NF demonstrated stability in catalytic performance, crystal structure, morphological structure, and composition during prolonged operation.
- interfacial engineering,
- transition metal oxide,
- nickel-iron hydroxide,
- oxygen evolution reaction,
- core-shell structure
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Efficient oxygen evolution reaction of CuCo2O4/NiFe-layered bimetallic hydroxide core-shell nanoflower sphere arrays

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Efficient oxygen evolution reaction of CuCo₂O₄/NiFe-layered bimetallic hydroxide core-shell nanoflower sphere arrays