Citation: Lili Wang, Xujie Han, Baichuan Xiong, Ya Yan, Cheng Zhang, Yuning Qu, Yiran Zhang, Linlin Zheng, Zirui Gao, Shuheng Tian, Wenjing Dai, Bowen Cheng, Hang Zhang, Zhen Yin. 1D self-supporting NiFe₂O₄/NiMoO₄ heterostructure as bifunctional electrocatalyst via interface engineering for highly efficient seawater splitting[J]. Chinese Chemical Letters, ;2025, 36(12): 111437. doi: 10.1016/j.cclet.2025.111437 shu

1D self-supporting NiFe₂O₄/NiMoO₄ heterostructure as bifunctional electrocatalyst via interface engineering for highly efficient seawater splitting

Lili Wang ^{a, *,} ,
Xujie Han ^{a, e} ,
Baichuan Xiong ^e ,
Ya Yan ^{a, e} ,
Cheng Zhang ^a ,
Yuning Qu ^a ,
Yiran Zhang ^a ,
Linlin Zheng ^a ,
Zirui Gao ^b ,
Shuheng Tian ^b ,
Wenjing Dai ^d ,
Bowen Cheng ^d ,
Hang Zhang ^{d, *,} ,
Zhen Yin ^{c, d, *,}

a.
State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry, Tiangong University, Tianjin 300387, China
b.
Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering and College of Engineering, and BIC-ESAT, Peking University, Beijing 100871, China
c.
Haian Institute of High-Tech Research, Nanjing University, Haian 226600, China
d.
State Key Laboratory of Bio-based Fiber Materials, Tianjin University of Science & Technology, Tianjin 300457, China
e.
School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China

wanglili@tiangong.edu.cn

zhanghang@tust.edu.cn

yinzhen@tust.edu.cn

Received Date: 18 April 2025
Revised Date: 9 June 2025
Accepted Date: 10 June 2025
Available Online: 10 June 2025

Figures(6)

Direct seawater electrolysis is a promising way for hydrogen energy production. However, developing efficient and cost-effective electrocatalysts remains a significant challenge for seawater electrolysis with industrial-level current density due to high concentration of salts and compete reaction of chlorine evolution. Herein, a 1D NiFe₂O₄/NiMoO₄ heterostructure as a bifunctional electrocatalyst for overall seawater splitting is constructed by combining NiMoO₄ nanowires with NiFe₂O₄ nanoparticles on carbon felt (CF) by a simple hydrothermal, impregnation and calcination method. The electrocatalyst exhibits low overpotential of 237 and 292 mV for oxygen evolution reaction and hydrogen evolution reaction at 400 mA/cm² in the alkaline seawater (1 mol/L KOH + 0.5 mol/L NaCl) due to the plentiful interfaces of NiFe₂O₄/NiMoO₄ which exposes more active sites and expands the active surface area, thereby enhancing its intrinsic activity and promoting the reaction kinetics. Notably, it displays low voltages of 1.95 V to drive current density of 400 mA/cm² in alkaline seawater with its excellent stability of 200 h at above 100 mA/cm², exhibiting outstanding performance and good corrosion resistance. This work provides an effective strategy for constructing efficient and cost-effective electrocatalysts for industrial seawater electrolysis, underscoring its potential for sustainable energy applications.
- Heterostructure,
- Seawater splitting,
- Interface construction,
- Bifunctional electrocatalyst,
- Carbon felt
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通讯作者: 陈斌, bchen63@163.com

1D self-supporting NiFe₂O₄/NiMoO₄ heterostructure as bifunctional electrocatalyst via interface engineering for highly efficient seawater splitting