Citation: Weigao Zhong, Qiming Sun, Jinsong Wang, Xiang Ao, Yuling Zhai, Tao Zhu, Xing Zhu, Hua Wang, Zhishan Li, Kongzhai Li, Chundong Wang. Engineering antiperovskite nitride for high-performing overall water splitting at ampere-level current densities[J]. Chinese Chemical Letters, ;2026, 37(11): 111699. doi: 10.1016/j.cclet.2025.111699 shu

Engineering antiperovskite nitride for high-performing overall water splitting at ampere-level current densities

Weigao Zhong ^a ,
Qiming Sun ^a ,
Jinsong Wang ^b ,
Xiang Ao ^c ,
Yuling Zhai ^a ,
Tao Zhu ^a ,
Xing Zhu ^a ,
Hua Wang ^a ,
Zhishan Li ^{a, *,} ,
Kongzhai Li ^{a, *,} ,
Chundong Wang ^{d, *,}

a.
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
b.
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
c.
School of Chemical Engineering, University of New South Wales, Sydney 2052, Australia
d.
School of Integrated Circuits, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

zhishanli@kust.edu.cn

kongzhai.li@aliyun.com

apcdwang@hust.edu.cn

Received Date: 26 June 2025
Revised Date: 31 July 2025
Accepted Date: 9 August 2025
Available Online: 10 August 2025

Figures(6)

Owing to the structural and compositional flexibility feature, antiperovskites have garnered widespread attention, and been regarded as promising catalysts. However, their intrinsic sluggish kinetics impede their practical applications. Herein, a CoN_0.73Co₃@CoFeN(OH)_x is constructed by a developed oxidation technology, endowing exceptional performance toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at ampere-level current densities. The advanced nature of our as-prepared antiperovskite could be further evidenced by an assembled alkaline electrolyzer (CoN_0.73Co₃@CoFeN(OH)_xCoN_0.73Co₃@CoFeN(OH)_x), yielding a current density of 1000 mA/cm² with 1.89 V, and stable working for over 100 h. Operando characterizations clarify that iron atoms in the antiperovskite skin promote the generation of CoOOH active species. Theoretical calculations are referred to understand the decent catalytic activity, which reveals that Fe atoms are responsible for the favorable adsorption of the OOH oxygen intermediate and modulate the hydrogen adsorption strength. This work paves a solid way for engineering the antiperovskites for green hydrogen generation applications.
- Antiperovskite nitride,
- CoN_0.73Co₃,
- Water splitting,
- Bifunctional electrocatalysts,
- Surface reconstruction
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