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Huang X, Han X, Tang R, Wu H, Chen S, Chen J, Zeng Z, Deng S, Wang J. Anion-Mediated In Situ Reconstruction of the Bi 2MoO 6 Precatalyst for Enhanced Electrochemical CO 2 Reduction over a Wide Potential Window. ACS APPLIED MATERIALS & INTERFACES 2024; 16:742-751. [PMID: 38110327 DOI: 10.1021/acsami.3c14930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Electrochemical CO2 reduction reaction (eCO2RR) is a viable approach to achieve carbon neutrality. Bismuth-based electrocatalysts demonstrate exceptional selectivity in CO2-to-formate conversion, but their reconstruction mechanisms during the eCO2RR remain elusive. Herein, the reconstruction processes of bismuth molybdate (Bi2MoO6) nanoplates are elucidated during the eCO2RR. Operando and ex situ measurements reveal the in situ partial reduction of Bi2MoO6 to Bi metal, forming Bi@Bi2MoO6 at negative potentials. Meanwhile, CO32- ions in the electrolyte spontaneously exchange with MoO42- in Bi2MoO6. The obtained Bi@Bi2MoO6/Bi2O2CO3 delivers a formate Faradaic efficiency (FE) of 95.2% at -1.0 V. Notably, high formate FEs (>90%) are maintained within a wide 500 mV window. Although computational calculations indicate a higher energy barrier for *OCHO formation on Bi2O2CO3, the prevention of excessive reduction to metal Bi significantly enhances long-term stability. Furthermore, the CO32- ion exchange process occurs in various 2D Bi-containing precatalysts, which should be emphasized in further studies.
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Affiliation(s)
- Xin Huang
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Xinxin Han
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Rujia Tang
- School of Resources & Environment, Nanchang University, Nanchang 330031, People's Republic of China
| | - Hongtao Wu
- School of Future Technology, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shixia Chen
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Jingwen Chen
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zheling Zeng
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
| | - Shuguang Deng
- School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Jun Wang
- School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China
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Meng X, Pan G, Liu H, Qian Y, Wang X, Wang C, Hu L, Wang H, Chen Q. Ultrasmall Cu Nanocrystals Dispersed in Nitrogen-Doped Carbon as Highly Efficient Catalysts for CO 2 Electroreduction. ACS APPLIED MATERIALS & INTERFACES 2022; 14:17240-17248. [PMID: 35380787 DOI: 10.1021/acsami.2c00050] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The electroreduction of carbon dioxide (CO2) to a liquid product is a viable method for establishing an artificial carbon cycle. Unfortunately, most electrocatalysts' low efficiency and instability prevent them from being used in practical applications. In the current study, we developed ultrasmall Cu nanocrystals embedded in nitrogen-doped carbon nanosheets (Cu/NC-NSs) for selective CO2 electroreduction by adjusting the potential. Cu/NC-NSs had 43.7 and 63.5% Faradaic efficiencies for the synthesis of ethanol and formate with applied potentials of -0.37 and -0.77 V vs reversible hydrogen electrode (RHE) using a flow cell architecture, respectively. Moreover, these Cu/NC-NSs show a steady catalytic performance up to 16 h. Density functional theory (DFT) calculations were performed to investigate the reaction mechanism. Furthermore, the synergistic effect formed by nitrogen-doped carbon and highly dispersed copper atoms led to their excellent performance in CO2 electroreduction.
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Affiliation(s)
- Xiangfu Meng
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Guoxing Pan
- Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Hongji Liu
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yong Qian
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xingyu Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Changlai Wang
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Center of Super-Diamond and Advanced Films (COSDAF), Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, Hong Kong
| | - Lin Hu
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
| | - Hui Wang
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qianwang Chen
- High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China
- Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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