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Title: Reduced graphene oxide-supported cobalt oxide decorated N-doped graphitic carbon for efficient bifunctional oxygen electrocatalysis
Authors: Li, Meng
Bao, Cheng
Liu, Yuting
Meng, Jing
Liu, Xia
Cai, Yongliang
Wuu, Delvin
Zong, Yun
Loh, Teck-Peng
Wang, Zhijuan
Keywords: Science::Chemistry
Graphene Oxide
Issue Date: 2019
Source: Li, M., Bao, C., Liu, Y., Meng, J., Liu, X., Cai, Y., . . . Wang, Z. (2019). Reduced graphene oxide-supported cobalt oxide decorated N-doped graphitic carbon for efficient bifunctional oxygen electrocatalysis. RSC Advances, 9(29), 16534-16540. doi:10.1039/C9RA02389E
Series/Report no.: RSC Advances
Abstract: A high-performance composite bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) has been synthesized via in situ growth of a hybrid precursor of graphene oxide (GO) and cobalt-based zeolite imidazolium framework (ZIF-67) under hydrothermal condition, followed by calcination at elevated temperature. The as-prepared composite bifunctional catalyst is confirmed to possess a structure of N-GC/Co@CoO/rGO, with core–shell nanoparticles of Co@CoO encapsulated in nitrogen-doped graphitic carbon (N-GC) thin layers which are then overall supported by reduced graphene oxide (rGO) sheets. With N-GC furnishing high population of ORR active sites, CoO being active for OER which is further enhanced by a highly conductive metal core, rGO sheets enhancing the overall electronic conduction, as well as the multiple synergistic couplings in the composite materials, pronounced ORR and OER catalytic activities with superior stability have been achieved. The catalysts also showed excellent tolerance to the crossover effect to methanol, showing great potential in energy-related applications requiring efficient oxygen electrocatalysis.
DOI: 10.1039/C9RA02389E
Rights: © 2019 The Royal Society of Chemistry. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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