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Zhao S, Qin Y, Wang X, Wang C, Chen X, Wang Y, Yu JX, Liu X, Wu Y, Chen Y. Anion Exchange Facilitates the In Situ Construction of Bi/BiO Interfaces for Enhanced Electrochemical CO 2 -to-Formate Conversion Over a Wide Potential Window. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302878. [PMID: 37376847 DOI: 10.1002/smll.202302878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/22/2023] [Indexed: 06/29/2023]
Abstract
Electrochemical reduction of CO2 (CO2 RR) into value-added products is a promising strategy to reduce energy consumption and solve environmental issues. Formic acid/formate is one of the high-value, easy-to-collect, and economically viable products. Herein, the reconstructed Bi2 O2 CO3 nanosheets (BOCR NSs) are synthesized by an in situ electrochemical anion exchange strategy from Bi2 O2 SO4 as a pre-catalyst. The BOCR NSs achieve a high formate Faradaic efficiency (FEformate ) of 95.7% at -1.1 V versus reversible hydrogen electrode (vs. RHE), and maintain FEformate above 90% in a wide potential range from -0.8 to -1.5 V in H-cell. The in situ spectroscopic studies reveal that the obtained BOCR NSs undergo the anion exchange from Bi2 O2 SO4 to Bi2 O2 CO3 and further promote the self-reduction to metallic Bi to construct Bi/BiO active site to facilitate the formation of OCHO* intermediate. This result demonstrates anion exchange strategy can be used to rational design high performance of the catalysts toward CO2 RR.
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Affiliation(s)
- Shulin Zhao
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Yue Qin
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Xuerong Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Chun Wang
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Xin Chen
- Institute of Theoretical and Applied Physics, School of Physical Science and Technology, Soochow University, Suzhou, 215006, China
| | - Yu Wang
- Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210023, China
| | - Jie-Xiang Yu
- Institute of Theoretical and Applied Physics, School of Physical Science and Technology, Soochow University, Suzhou, 215006, China
| | - Xiaojing Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Yuping Wu
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Yuhui Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, and School of Energy Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
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