Citation: Bin Zhao, Heping Luo, Jiaqing Liu, Sha Chen, Han Xu, Yu Liao, Xue Feng Lu, Yan Qing, Yiqiang Wu. S-doped carbonized wood fiber decorated with sulfide heterojunction-embedded S, N-doped carbon microleaf arrays for efficient high-current-density oxygen evolution[J]. Chinese Chemical Letters, ;2025, 36(5): 109919. doi: 10.1016/j.cclet.2024.109919 shu

S-doped carbonized wood fiber decorated with sulfide heterojunction-embedded S, N-doped carbon microleaf arrays for efficient high-current-density oxygen evolution

Bin Zhao ^a ,
Heping Luo ^a ,
Jiaqing Liu ^b ,
Sha Chen ^a ,
Han Xu ^{a, *,} ,
Yu Liao ^a ,
Xue Feng Lu ^{b, *,} ,
Yan Qing ^{a, *,} ,
Yiqiang Wu ^a

a.
College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
b.
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China

xuh@csuft.edu.cn

luxf@fzu.edu.cn

qingyan@csuft.edu.cn

Received Date: 22 February 2024
Revised Date: 22 March 2024
Accepted Date: 23 April 2024
Available Online: 24 April 2024

Figures(6)

Industrial high-current-density oxygen evolution catalyst is the key to accelerating the practical application of hydrogen energy. Herein, Co₉S₈/CoS heterojunctions were rationally encapsulated in S, N-codoped carbon ((Co₉S₈/CoS)@SNC) microleaf arrays, which are rooted on S-doped carbonized wood fibers (SCWF). Benefiting from the synergistic electronic interactions on heterointerfaces and the accelerated mass transfer by array structure, the obtained self-supporting (Co₉S₈/CoS)@SNC/SCWF electrode exhibits superior performance toward alkaline oxygen evolution reaction (OER) with an ultra-low overpotential of 274 mV at 1000 mA/cm², a small Tafel slope of 48.84 mV/dec, and ultralong stability up to 100 h. Theoretical calculations show that interfacing Co₉S₈ with CoS can upshift the d-band center of the Co atoms and strengthen the interactions with oxygen intermediates, thereby favoring OER performance. Furthermore, the (Co₉S₈/CoS)@SNC/SCWF electrode shows outstanding rechargeability and stable cycle life in aqueous Zn-air batteries with a peak power density of 201.3 mW/cm², exceeding the commercial RuO₂ and Pt/C hybrid catalysts. This work presents a promising strategy for the design of high-current-density OER electrocatalysts from sustainable wood fiber resources, thus promoting their practical applications in the field of electrochemical energy storage and conversion.
- Electrocatalyst,
- Heterojunction,
- Oxygen evolution reaction,
- Wood fiber,
- Sulfide
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