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Fully Exposed Copper Single-Atom Sites on Mesoporous N/S-Codoped Graphene for Efficient Zinc-Air Battery

SSRN, ISSN: 1556-5068
2024
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  • Usage
    107

Article Description

Transition metal single-atom catalysts are recently emerging as the most potential candidates for the oxygen reduction reaction due to their remarkable activity and durability, yet subjected to limited availability proportion of active sites to reactant in practice due to the lack of favorable morphology. Herein, the ultrathin mesoporous N/S-codoped graphene is fabricated by a potassium thiocyanate (KSCN) assisted pyrolysis of metal-organic framework (ZIF-8) as the robust substrate for anchoring copper single-atom sites. The KSCN-assisted pyrolysis can not only create N and S coordination atoms but also regulate the fully exposed morphology. The g-Cu-SACs show excellent catalytic activity in alkaline oxygen reduction reaction with a half-wave potential of 0.920 VRHE and good cycling stability. Furthermore, the zinc-air battery assembled with g-Cu-SACs also exhibits high specific capacity and remarkable cycling lifetime. This work provides a novel strategy to construct highly exposed single-atom catalysts for energy-related applications.

Bibliographic Details

Lifen Yang; Changliang Du; Jiachen Tian; Xiuyun Yao; Qianwei Zhang; Xilan Ma; Youqi Zhu; Meishuai Zou; Chuanbao Cao

Elsevier BV

Multidisciplinary; Single-atom catalysts; Graphene; Mesoporous structure; oxygen reduction reaction; Zn-air battery

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