期刊
CHINESE JOURNAL OF CATALYSIS
卷 41, 期 11, 页码 1754-1760出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(20)63613-0
关键词
2D MOFs; Derivative; Coupled arrays; Binder-free; Oxygen electrode
资金
- National Natural Science Foundations of China [51902027, 61874013, 51976143, 61874014, 61674019, 61974011]
- National Basic Research of China [2015CB932500]
- Fundamental Research Funds for the Central Universities [2019RC20]
- State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications, P.R. China)
Oxygen electrocatalysis, exemplified by the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), is central to energy storage and conversion technologies such as fuel cells, metal-air batteries, and water electrolysis. However, highly effective and inexpensive earth-abundant materials are sought after to replace the noble metal-based electrocatalysts currently in use. Recently, metal-organic frameworks (MOFs) and carbon-based MOF derivatives have attracted considerable attention as efficient catalysts due to their exceedingly tunable morphologies, structures, compositions, and functionalization. Here, we report two-dimensional (2D) MOF/MOF derivative coupled arrays on nickel foam as binder-free bifunctional ORR/OER catalysts with enhanced electrocatalytic activity and stability. Their remarkable electrochemical properties are primarily attributed to fully exposed active sites and facilitated charge-transfer kinetics. The coupled and hierarchical nanosheet arrays produced via our growth-pyrolysis-regrowth strategy offer promise in the development of highly active electrodes for energy-related electrochemical devices. (c) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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