Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (11): 1754-1760.DOI: 10.1016/S1872-2067(20)63613-0

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Two-dimensional MOF/MOF derivative arrays on nickel foam as efficient bifunctional coupled oxygen electrodes

Kai Huanga, Shuai Guoa, Ruyue Wanga,b, Sen Lina,b, Naveed Hussainb, Hehe Weib, Bohan Dengb, Yuanzheng Longb, Ming Leia, Haolin Tangc, Hui Wub   

  1. a State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    b State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
    c State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, Hubei, China
  • Received:2020-02-23 Revised:2020-03-27 Online:2020-11-18 Published:2020-08-15
  • Supported by:
    This study is supported by the 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) and Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications, P.R. China).

Abstract: 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.

Key words: 2D MOFs, Derivative, Coupled arrays, Binder-free, Oxygen electrode