期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 24, 页码 13011-13019出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.01.150
关键词
Nitrogen reduction reaction; Electrocatalysis; Mo2C; N-doped porous carbon; High faradaic efficiency
资金
- National Natural Science Foundation of China of China [21862011, 51864024]
- Research Grants Council of the Hong Kong Special Administrative Region, China [CityU 11206520]
- Yunnan province [2019FI003]
- Kunming University of Science and Technology [KKKP201707010, KKKP201752011]
- Shenzhen Knowledge Innovation Program [JCYJ20190808181205752]
Inspired by active Mo-nitrogenase, Mo2C/NC was developed as an efficient e-NRR electrocatalyst with good activity and stability. This study provides new perspectives on using metal carbides and their compounds as catalysts for efficient e-NRR.
Electrochemical nitrogen reduction reaction (e-NRR) is an attractive prospect for ammonia production under mild conditions using renewable energy. However, developing efficient and stable electrocatalysts for driving e-NRR remains a great challenge. Herein, inspired by the biological nitrogen fixation via active Mo-nitrogenase, molybdenum carbide on N-doped porous carbon (Mo2C/NC) derived from Mo/Zn-ZIFs was developed for the first time, as an efficient e-NRR electrocatalyst under ambient conditions. In 0.1 M Na2SO4 electrolyte, the Mo2C/NC catalyst achieved a maximum NH3 yield rate of 70.6 mmol h(-1) g(cat.)(-1) and a faradaic efficiency of 12.3% at - 0.2 V vs. RHE. Additionally, Mo2C/NC displayed favorable electrochemical selectivity and durability during the longtime electrolysis, attributed to the structural and electrochemical stability of Mo2C and ZIFs-derived carbon framework. This work provides new perspectives upon metal carbides and their compounds as catalysts for efficient e-NRR. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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