Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas
Post-combustion flue gas (mainly containing 5-40% CO2 balanced by N2 ) accounts for about 60% global CO2 emission. Rational conversion of flue gas into value-added chemicals is still a formidable challenge. Herein, this work reports a β-Bi2 O3 -derived bismuth (OD-Bi) catalyst with surface coordinat...
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sg-ntu-dr.10356-1703382023-09-08T01:39:29Z Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas Yang, Fangqi Liang, Caihong Zhou, Weizhen Zhao, Wendi Li, Pengfei Hua, Zhengyu Yu, Haoming Chen, Shixia Deng, Shuguang Li, Jing Lam, Yeng Ming Wang, Jun School of Materials Science and Engineering Facility for Analysis, Characterisation, Testing and Simulation Engineering::Materials Bismuth Electrocatalysts Post-combustion flue gas (mainly containing 5-40% CO2 balanced by N2 ) accounts for about 60% global CO2 emission. Rational conversion of flue gas into value-added chemicals is still a formidable challenge. Herein, this work reports a β-Bi2 O3 -derived bismuth (OD-Bi) catalyst with surface coordinated oxygen for efficient electroreduction of pure CO2 , N2, and flue gas. During pure CO2 electroreduction, the maximum Faradaic efficiency (FE) of formate reaches 98.0% and stays above 90% in a broad potential of 600 mV with a long-term stability of 50 h. Additionally, OD-Bi achieves an ammonia (NH3 ) FE of 18.53% and yield rate of 11.5 µg h-1 mgcat -1 in pure N2 atmosphere. Noticeably, in simulated flue gas (15% CO2 balanced by N2 with trace impurities), a maximum formate FE of 97.3% is delivered within a flow cell, meanwhile above 90% formate FEs are obtained in a wide potential range of 700 mV. In-situ Raman combined with theory calculations reveals that the surface coordinated oxygen species in OD-Bi can drastically activate CO2 and N2 molecules by selectively favors the adsorption of *OCHO and *NNH intermediates, respectively. This work provides a surface oxygen modulation strategy to develop efficient bismuth-based electrocatalysts for directly reducing commercially relevant flue gas into valuable chemicals. Ministry of Education (MOE) This research work was supported by the National Natural Science Foundation of China (No. 21908090, 22108243, 22168023, and 22272004) and the Natural Science Foundation of Jiangxi Province (No. 20212BAB213038). F. Yang acknowledges the 2020 Nanchang University Scholarship for Doctoral Visiting Abroad. Y. M. Lam acknowledges the financial support from Ministry of Education (MOE), Singapore (MOE‐T2‐1‐085, MOE‐T1‐RG98/19). J. Li acknowledges the support from the Fundamental Research Funds for the Central Universities (YWF‐22‐L‐1256). 2023-09-08T01:39:29Z 2023-09-08T01:39:29Z 2023 Journal Article Yang, F., Liang, C., Zhou, W., Zhao, W., Li, P., Hua, Z., Yu, H., Chen, S., Deng, S., Li, J., Lam, Y. M. & Wang, J. (2023). Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas. Small, 19(30), 2300417-. https://dx.doi.org/10.1002/smll.202300417 1613-6810 https://hdl.handle.net/10356/170338 10.1002/smll.202300417 37026664 2-s2.0-85151952424 30 19 2300417 en MOE‐T2‐1‐085 MOE‐T1‐RG98/19 Small © 2023 Wiley-VCH GmbH. All rights reserved. |
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Engineering::Materials Bismuth Electrocatalysts Yang, Fangqi Liang, Caihong Zhou, Weizhen Zhao, Wendi Li, Pengfei Hua, Zhengyu Yu, Haoming Chen, Shixia Deng, Shuguang Li, Jing Lam, Yeng Ming Wang, Jun Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
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Post-combustion flue gas (mainly containing 5-40% CO2 balanced by N2 ) accounts for about 60% global CO2 emission. Rational conversion of flue gas into value-added chemicals is still a formidable challenge. Herein, this work reports a β-Bi2 O3 -derived bismuth (OD-Bi) catalyst with surface coordinated oxygen for efficient electroreduction of pure CO2 , N2, and flue gas. During pure CO2 electroreduction, the maximum Faradaic efficiency (FE) of formate reaches 98.0% and stays above 90% in a broad potential of 600 mV with a long-term stability of 50 h. Additionally, OD-Bi achieves an ammonia (NH3 ) FE of 18.53% and yield rate of 11.5 µg h-1 mgcat -1 in pure N2 atmosphere. Noticeably, in simulated flue gas (15% CO2 balanced by N2 with trace impurities), a maximum formate FE of 97.3% is delivered within a flow cell, meanwhile above 90% formate FEs are obtained in a wide potential range of 700 mV. In-situ Raman combined with theory calculations reveals that the surface coordinated oxygen species in OD-Bi can drastically activate CO2 and N2 molecules by selectively favors the adsorption of *OCHO and *NNH intermediates, respectively. This work provides a surface oxygen modulation strategy to develop efficient bismuth-based electrocatalysts for directly reducing commercially relevant flue gas into valuable chemicals. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Yang, Fangqi Liang, Caihong Zhou, Weizhen Zhao, Wendi Li, Pengfei Hua, Zhengyu Yu, Haoming Chen, Shixia Deng, Shuguang Li, Jing Lam, Yeng Ming Wang, Jun |
format |
Article |
author |
Yang, Fangqi Liang, Caihong Zhou, Weizhen Zhao, Wendi Li, Pengfei Hua, Zhengyu Yu, Haoming Chen, Shixia Deng, Shuguang Li, Jing Lam, Yeng Ming Wang, Jun |
author_sort |
Yang, Fangqi |
title |
Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
title_short |
Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
title_full |
Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
title_fullStr |
Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
title_full_unstemmed |
Oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
title_sort |
oxide-derived bismuth as an efficient catalyst for electrochemical reduction of flue gas |
publishDate |
2023 |
url |
https://hdl.handle.net/10356/170338 |
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1779156394882105344 |