Abstract
The electro-catalytic performance of the bi-functional catalysts at the air cathode for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) plays a significant role for the development of rechargeable zinc air batteries (ZABs). To obtain the high-performance electrocatalysts, a series of porous Co3O4 samples derived from zeolitic imidazolate framework-67 (ZIF-67) are prepared by one-step annealing process at different temperature (350, 450, and 550 °C) under air atmosphere. Compared with the commercial Co3O4, the optimized sample Co3O4 prepared at 450 °C (CO3O4/C-450) exhibits the lowest overpotential of 1.68 V and the highest half-wave potential of − 0.56 V because the porosity of as-prepared Co3O4 provides abundant reactive sites. Moreover, the high discharge potential of 1.33 V and long cycle life of more than 100 h at 20 mA cm−2 are achieved in ZABs with CO3O4/C-450 electrocatalyst, which are attributed to the better stability provided by the carbon coating.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
