KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Fe and Cu Double-Doped Co3O4 Nanorod with Abundant Oxygen Vacancies: A High-Rate Electrocatalyst for Tandem Electroreduction of Nitrate to Ammonia | |
Song, Maosen1; Xing, Yuxuan1; Li, Yudong2; Liu, Dan2; Han, Enshan1; Gao, Yang1; Yang, Ziyi1; Yang, Xiaohui3 ; He, Yanzhen1
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| 2023-09-22 | |
| 摘要 | The electrochemical nitrate reduction reaction (NO3RR) is an attractive green alternative to the conventional Haber-Bosch method for the synthesis of NH3. However, this reaction is a tandem process that involves multiple steps of electrons and protons, posing a significant challenge to the efficient synthesis of NH3. Herein, we report a high-rate NO3RR electrocatalyst of Fe and Cu double-doped Co3O4 nanorod (Fe-1/Cu-2-Co3O4) with abundant oxygen vacancies, where the Cu preferentially catalyzes the rapid conversion of NO3- to NO2- and the oxygen vacancy in the Co3O4 substrate can accelerate NO2- reduction to NH3. In addition, the introduction of Fe can efficiently capture atomic H* that promotes the dynamics of NO2- to NH3, improving Faradaic efficiency of the produced NH3. Controlled experimental results show that the optimal electrocatalyst of Fe-1/Cu-2-Co3O4 exhibits good performance with high conversion (93.39%), Faradaic efficiency (98.15%), and ammonia selectivity (98.19%), which is significantly better than other Co-based materials. This work provides guidance for the rational design of high-performance NO3RR catalysts. |
| DOI | 10.1021/acs.inorgchem.3c02834 |
| 发表期刊 | INORGANIC CHEMISTRY
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| ISSN | 0020-1669 |
| 卷号 | 62期号:40页码:16641-16651 |
| 通讯作者 | Yang, Xiaohui(yangxiaohui@cigit.ac.cn) ; He, Yanzhen(yzhe87@163.com) |
| 收录类别 | SCI |
| WOS记录号 | WOS:001071395500001 |
| 语种 | 英语 |
