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- Title
Atomically Dispersed Iron-Nitrogen Species as Electrocatalysts for Bifunctional Oxygen Evolution and Reduction Reactions.
- Authors
Chen, Pengzuo; Zhou, Tianpei; Xing, Lili; Xu, Kun; Tong, Yun; Xie, Hui; Zhang, Lidong; Yan, Wensheng; Chu, Wangsheng; Wu, Changzheng; Xie, Yi
- Abstract
Rational design of non-noble materials as highly efficient, economical, and durable bifunctional catalysts for oxygen evolution and reduction reactions (OER/ORR) is currently a critical obstacle for rechargeable metal-air batteries. A new route involving S was developed to achieve atomic dispersion of Fe-N x species on N and S co-decorated hierarchical carbon layers, resulting in single-atom bifunctional OER/ORR catalysts for the first time. The abundant atomically dispersed Fe-N x species are highly catalytically active, the hierarchical structure offers more opportunities for active sites, and the electrical conductivity is greatly improved. The obtained electrocatalyst exhibits higher limiting current density and a more positive half-wave potential for ORR, as well as a lower overpotential for OER under alkaline conditions. Moreover, a rechargeable Zn-air battery device comprising this hybrid catalyst shows superior performance compared to Pt/C catalyst. This work will open a new avenue to design advanced bifunctional catalysts for reversible energy storage and conversion devices.
- Subjects
OXYGEN evolution reactions; RENEWABLE energy industry; OXIDATION-reduction reaction; ENERGY storage; ELECTROCATALYSIS
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 2, p625
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201610119