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Liu Q, Liu Q, Xie L, Ji Y, Li T, Zhang B, Li N, Tang B, Liu Y, Gao S, Luo Y, Yu L, Kong Q, Sun X. High-Performance Electrochemical Nitrate Reduction to Ammonia under Ambient Conditions Using a FeOOH Nanorod Catalyst. ACS APPLIED MATERIALS & INTERFACES 2022; 14:17312-17318. [PMID: 35394760 DOI: 10.1021/acsami.2c00436] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Electrocatalytic nitrate reduction is promising as an environmentally friendly process to produce high value-added ammonia with simultaneous removal of nitrate, a widespread nitrogen pollutant, for water treatment; however, efficient electrocatalysts with high selectivity are required for ammonia formation. In this work, FeOOH nanorod with intrinsic oxygen vacancy supported on carbon paper (FeOOH/CP) is proposed as a high-performance electrocatalyst for converting nitrate to ammonia at room temperature. When operated in a 0.1 M phosphate-buffered saline (PBS) solution with 0.1 M NaNO3, FeOOH/CP is able to obtain a large NH3 yield of 2419 μg h-1 cm-2 and a surprisingly high Faradic efficiency of 92% with excellent stability. Density functional theory calculation demonstrates that the potential-determining step for nitrate reduction over FeOOH (200) is *NO2H + H+ + e- → *NO + H2O.
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Affiliation(s)
- Qin Liu
- School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, Shaanxi, China
| | - Qian Liu
- Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Lisi Xie
- Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Yuyao Ji
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
| | - Tingshuai Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
| | - Bing Zhang
- Department of Ecology and Environment of Sichuan Province, Leshan Environmental Monitoring Center Station of Sichuan Province, Leshan 614000, Sichuan, China
| | - Na Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China
| | - Bo Tang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China
| | - Yang Liu
- School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Shuyan Gao
- School of Materials Science and Engineering, Henan Normal University, Xinxiang 453007, Henan, China
| | - Yonglan Luo
- Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
| | - Lingmin Yu
- School of Materials and Chemical Engineering, Xi'an Technological University, Xi'an 710021, Shaanxi, China
| | - Qingquan Kong
- 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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