Citation:
Kai Huang, Shuai Guo, Ruyue Wang, Sen Lin, Naveed Hussain, Hehe Wei, Bohan Deng, Yuanzheng Long, Ming Lei, Haolin Tang, Hui Wu. Two-dimensional MOF/MOF derivative arrays on nickel foam as efficient bifunctional coupled oxygen electrodes[J]. Chinese Journal of Catalysis,
;2020, 41(11): 1754-1760.
doi:
10.1016/S1872-2067(20)63613-0
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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.
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Keywords:
- 2D MOFs,
- Derivative,
- Coupled arrays,
- Binder-free,
- Oxygen electrode
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