In Situ Bismuth Nanosheet Assembly for Highly Selective Electrocatalytic CO2 Reduction to Formate

Chan-Juan Peng; Xin-Tao Wu; Guang Zeng; Qi-Long Zhu

doi:10.1002/asia.202100305

In Situ Bismuth Nanosheet Assembly for Highly Selective Electrocatalytic CO₂ Reduction to Formate

Chem Asian J. 2021 Jun 14;16(12):1539-1544. doi: 10.1002/asia.202100305. Epub 2021 May 10.

Authors

Chan-Juan Peng^{1

2}, Xin-Tao Wu^{1

2}, Guang Zeng^{1

3}, Qi-Long Zhu^{1

2

4}

Affiliations

¹ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
² University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Changsha University of Science and Technology, Changsha, 410114, P. R. China.
⁴ Key Laboratory of Functional Small Molecules for Ministry of Education, Jiangxi Normal University, Nanchang, 330022, P. R. China.

PMID: 33929102
DOI: 10.1002/asia.202100305

Abstract

The reduction of carbon dioxide (CO₂ ) into value-added fuels using an electrochemical method has been regarded as a compelling sustainable energy conversion technology. However, high-performance electrocatalysts for CO₂ reduction reaction (CO₂ RR) with high formate selectivity and good stability need to be improved. Earth-abundant Bi has been demonstrated to be active for CO₂ RR to formate. Herein, we fabricated an extremely active and selective bismuth nanosheet (Bi-NSs) assembly via an in situ electrochemical transformation of (BiO)₂ CO₃ nanostructures. The as-prepared material exhibits high activity and selectivity for CO₂ RR to formate, with nearly 94% faradaic efficiency at -1.03 V (versus reversible hydrogen electrode (vs. RHE)) and stable selectivity (>90%) in a large potential window ranging from -0.83 to -1.18 V (vs. RHE) and excellent durability during 12 h continuous electrolysis. In addition, the Bi-NSs based CO₂ RR/methanol oxidation reaction (CO₂ RR/MOR) electrolytic system for overall CO₂ splitting was constructed, evidencing the feasibility of its practical implementation.

Keywords: bismuth nanosheets; electrocatalytic CO2 reduction; formate; in situ electrochemical transformation.

Abstract

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