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Chen Q, An X, Liu Q, Wu X, Xie L, Zhang J, Yao W, Hamdy MS, Kong Q, Sun X. Boosting electrochemical nitrite-ammonia conversion properties by a Cu foam@Cu 2O catalyst. Chem Commun (Camb) 2021; 58:517-520. [PMID: 34908040 DOI: 10.1039/d1cc06215h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Electrocatalytic reduction of nitrite (NO2-) to ammonia (NH3) can simultaneously achieve wastewater treatment and ammonia production, but it needs efficient catalysts. Herein, Cu2O particles self-supported on Cu foam with enriched oxygen vacancies are developed to enable selective NO2- reduction to NH3, exhibiting a maximum NH3 yield rate of 7510.73 μg h-1 cm-2 and high faradaic efficiency of 94.21% at -0.6 V in 0.1 M PBS containing 0.1 M NaNO2. Density functional theory calculations reveal the vital role of oxygen vacancies during the nitrite reduction process, as well as the reaction mechanisms and the potential limiting step involved. This work provides a new avenue to the rational design of Cu-based catalysts for NH3 electrosynthesis.
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Affiliation(s)
- Qiuyue Chen
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China.
| | - Xuguang An
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China.
| | - Qian Liu
- Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Xiaoqiang Wu
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China.
| | - Lisi Xie
- Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Jing Zhang
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China.
| | - Weitang Yao
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China.
| | - Mohamed S Hamdy
- Catalysis Research Group (CRG), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Qingquan Kong
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, Sichuan, China. .,Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Xuping Sun
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
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