Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 15, Pages 17249-17258Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c00163
Keywords
rGO hybrid BCN nanotube; three dimensional hybrid structure; Co/Co-N/Co-O; bifunctional oxygen electrocatalyst; Zn-air batteries
Funding
- NSF of China [21878231, 51802216]
- NSF of Tianjin [19JCZDJC37300]
- Youth Foundation of Jiangxi Provincial Department of Education [GJJ210856, GJJ210857]
- Key Project of Natural Science Foundation of Jiangxi Province [20212ACB203004]
- Jiangsu Key RD Plan [BE2018006-4]
- Planning Project of Jiangxi Provincial Technological Innovation Guidance [20202BDH80003]
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In this study, a high-performance non-noble metal bifunctional oxygen reduction and evolution reaction electrocatalyst, BCN/rGO-Co, was successfully prepared by embedding Co/Co-N/Co-O onto reduced graphene oxide (rGO) hybrid boron and nitrogen codoped carbon (BCN) nanotube arrays. The material exhibited superior bifunctional oxygen catalytic activity, high power density, and long cycle stability.
Developing high-performance non-noble metal bifunctional oxygen reduction and evolution reaction electrocatalysts is a critical factor for the commercialization of rechargeable Zn-air batteries. Herein, Co/Co-N/Co-O rooted on reduced graphene oxide (rGO) hybrid boron and nitrogen codoped carbon (BCN) nanotube arrays (BCN/rGO-Co) is prepared by facile low-temperature precross-linking and high-temperature pyrolysis treatment. Benefit from the synergistic effect of its B/N codoping, Co/Co-N/Co-O bifunctional active sites, 3D hybrid porous structure of BCN nanotubes, and highly conductive rGO sheets. The obtained BCN/rGO-Co exhibits superior bifunctional oxygen catalytic activity with a positive ORR half-wave potential (0.85 V) and a low OER potential (1.61 V) at 10 mA cm(-1). Additionally, the BCN/rGO-Co-based liquid Zn-air batteries displays a large peak power density of 157 mW cm(-2), and a long charge/discharge cycle stability of 200 h, outdoing the commercial Pt/C+Ru/C catalyst.
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