Citation: Yaoyin Lou, Xiaoyang Jerry Huang, Kuang-Min Zhao, Mark J. Douthwaite, Tingting Fan, Fa Lu, Ouardia Akdim, Na Tian, Shigang Sun, Graham J. Hutchings. Stable core-shell Janus BiAg bimetallic catalyst for CO₂ electrolysis into formate[J]. Chinese Chemical Letters, ;2025, 36(3): 110300. doi: 10.1016/j.cclet.2024.110300 shu

Stable core-shell Janus BiAg bimetallic catalyst for CO₂ electrolysis into formate

Yaoyin Lou ^{a, c} ,
Xiaoyang Jerry Huang ^{b, d} ,
Kuang-Min Zhao ^c ,
Mark J. Douthwaite ^b ,
Tingting Fan ^c ,
Fa Lu ^c ,
Ouardia Akdim ^{b, *,} ,
Na Tian ^c ,
Shigang Sun ^{c, d, *,} ,
Graham J. Hutchings ^{b, *,}

a.
CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
b.
Max Planck-Cardiff Centre on the Fundamentals of Heterogeneous Catalysis FUNCAT, Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, United Kingdom
c.
State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
d.
Center of Advanced Electrochemical Energy, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 400044, China

akdimo@cardiff.ac.uk

sgsun@xmu.edu.cn

hutch@cardiff.ac.uk

Received Date: 28 February 2024
Revised Date: 18 July 2024
Accepted Date: 26 July 2024
Available Online: 27 July 2024

Figures(4)

CO₂ electrolysis into formate is a promising technology with the potential to simultaneously alleviate energy shortages and global warming. However, the limited stability of the catalysts during long-term electrolysis hinders their widespread implementation. Herein, we show that a core-shell bimetallic BiAg catalyst with a multifaceted Janus structure at its core can achieve a stability of up to 300 h with a formate faradaic efficiency (FE_formate) over 90% at −0.75 V vs. RHE (reversible hydrogen electrode) in an H-type cell. Our investigations reveal the important role of the Janus structure on the transfer of electrons, favoring their delocalization across the catalyst and enhancing their mobility. We propose that the compressive strain inclined to grain boundaries within this structure would lower the energy barrier for electrons transfer and promotes the cooperation between Ag and Bi. Indeed, Ag initiates the activation of CO₂ through a series of cascade reactions and is subsequently hydrogenated on Bi. Additionally, our study suggests that Ag plays a crucial role in stabilizing the catalyst structure after long-term electrolysis. This work highlights a new strategy for tandem CO₂ electrolysis, providing novel insights for the design of formate formation catalysts.
- CO₂ reduction,
- Cascade catalysis,
- Formate,
- BiAg,
- Janus
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Stable core-shell Janus BiAg bimetallic catalyst for CO2 electrolysis into formate

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Stable core-shell Janus BiAg bimetallic catalyst for CO₂ electrolysis into formate