Journal
CHEMICAL ENGINEERING JOURNAL
Volume 419, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129619
Keywords
Oxygen reduction reaction (ORR); Oxygen evolution reaction (OER); Cobalt-based; Carbon; Zn-air battery
Categories
Funding
- National Natural Science Foundation of China [21605067, 21763023]
- Liaoning BaiQianWan Talents Program [2019B042]
- Excellent Young Scientific and Technological Talents Project of Educational Department of Liaoning Province [2020LNQN07]
- Excellent Youth Talent Program of University of Science and Technology Liaoning [601011507-06]
Ask authors/readers for more resources
This study presents a hybrid Co-based carbon composite derived from ZIF-67 as a bifunctional ORR/OER electrocatalyst, showing excellent performance and stability in a custom-built Zn-air battery. The catalyst, with multiple active sites including Co-N4, Co-N/SC, C-N/S-C, Co3O4 and CoS, as well as surface and edge defects in the carbon matrix, exhibits highly efficient bifunctional ORR/OER catalytic activity for reversible oxygen electrodes. The catalyst demonstrates competitive performance against state-of-the-art bifunctional ORR/OER electrocatalysts reported to date, positioning it among the best non-precious metal catalysts for reversible oxygen reactions.
The development of high-performance non-precious bifunctional electrocatalysts for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is urgently needed to realize the commercialization of rechargeable metal-air battery. Herein, we report a ZIF-67 derived hybrid Co-based carbon composite as bifunctional ORR/OER electrocatalyst exhibiting excellent performance and stability in a custom-built Zn-air battery. The catalyst was formed by pyrolytic carbonization of ZIF-67 followed by mild oxidation and sulfurization to a hybrid composite (Co/Co3O4@CoS-SNC) comprised of multiple active sites including Co-N4, Co-N/SC, C-N/S-C, Co3O4 and CoS, as well as the surface and edge defects in the carbon matrix, that act concertedly yielding a highly efficient bifunctional ORR/OER catalyst for reversible oxygen electrodes. The catalyst affords remarkably low reversible overpotentials and stability not only in a 3-electrode system, but also in a customconstructed Zn-air battery, exhibiting competitive performance against state-of-the-art bifunctional ORR/OER electrocatalysts reported to date and thus placing it among the best non-precious metal catalysts for reversible oxygen reactions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available