Citation: Yangping Zhang, Tianpeng Liu, Jun Yu, Zhengying Wu, Dongqiong Wang, Yukou Du. Amorphous/crystalline AgS@CoS core@shell catalysts for efficient oxygen evolution reaction[J]. Chinese Chemical Letters, ;2025, 36(8): 110275. doi: 10.1016/j.cclet.2024.110275 shu

Amorphous/crystalline AgS@CoS core@shell catalysts for efficient oxygen evolution reaction

Yangping Zhang ^a ,
Tianpeng Liu ^a ,
Jun Yu ^a ,
Zhengying Wu ^{b, *,} ,
Dongqiong Wang ^a ,
Yukou Du ^{a, c, *,}

a.
College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
b.
Jiangsu Key Laboratory for Environment Functional Materials, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
c.
School of Optical and Electronic Information, Suzhou City University, Suzhou 215104, China

zywu@mail.usts.edu.cn

duyk@suda.edu.cn

Received Date: 24 June 2024
Revised Date: 11 July 2024
Accepted Date: 16 July 2024
Available Online: 20 July 2024

Figures(5)

The core@shell structure materials with the synergistic effect have been confirmed as promising catalysts for oxygen evolution reaction (OER). However, the conventional catalysts with crystalline phase suffer from deficient active sites, elemental dissolution, and structural collapse during OER catalysis, which results in the limited OER performance. Herein, we introduced the amorphous phase structure by controllable wet-chemical sulfuration strategy, thus to prepare the amorphous/crystalline (a/c) AgS@CoS core@shell catalysts. Benefitting from the core@shell construction with synergistic interaction, a/c heterophase with well-balanced catalytic activity and stability, favorable sulfides components with positive oxysulfide reconstructed layer formation, the optimized AgS@CoS-2 catalysts displayed superior OER catalytic behaviors with a low overpotential of 260 mV and Tafel slope of 64.4 mV/dec on the current density of 10 mA/cm², surpassing the counterpart catalysts and commercial RuO₂ catalysts. Meanwhile, the AgS@CoS-2 catalysts possessed remarkable OER catalytic stability, as well as the favorable overall water splitting performance.
- Hierarchical core@shell catalysts amorphous/crystalline,
- AgS@CoS,
- Oxygen revolution reaction,
- Overall water splitting
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