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General Chemistry ›› 2021, Vol. 7 ›› Issue (4): 210013-210013.DOI: 10.21127/yaoyigc20210013

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Carbon-Coupling Metallic Cobalt as Trifunctional Catalysis for Oxygen Reduction/Evolution and Hydrogen Evolution

Zihao Zhou, Kangdi Lin, Chenting Peng, Hongyun Huang, Yanli Wu, and Ming Sun*   

  1. Key Laboratory of Clean Chemistry Technology of Guangdong Regular Higher Education Institutions, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006 China
  • Received:2021-10-12 Accepted:2021-12-09 Online:2021-12-20 Published:2021-12-31
  • Contact: Email: sunmgz@gdut.edu.cn (M. S.)

Abstract: The next-generation energy storage focuses on sustainability and renewability, facilitating the process of metal-air batteries and fuel cells. Nevertheless, their performances are suffering from the tardy development of the elaborate design and large-scale synthesis strategy of cost-efficient electrocatalysts. In this work, a convenient strategy for facile synthesizing electroactive material is proposed. As a result, a trifunctional Co/C catalyst is fabricated via a convenient calcination process, utilizing the pyrolysis of cobalt acetate and melamine. The prepared Co/C sample delivers a positive half-wave potential of 0.75 V in oxygen reduction reaction (ORR). Furthermore, the low overpotentials at 10 mA cm−2 are shown in alkaline conditions for oxygen evolution reaction (OER, 388 mV) and hydrogen evolution reaction (HER, 202 mV). The improved activity is mainly due to the interaction between Co and the in situ formed carbon carrier. The promising trifunctional activities endow the Co/C sample with a bright prospect in metal-air batteries and overall water splitting.

Key words: trifunctional catalyst, oxygen reduction, oxygen evolution, hydrogen evolution

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