期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 259, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118100
关键词
Amorphous CoNx; Nitrogen-doped graphene aerogel; Water electrolysis; Zinc-air battery; Electrochemistry
资金
- National Natural Science Foundation of China [21771098]
- Science and Technology Innovation Commission of Shenzhen Municipality [JCYJ20170817111548026]
- Shenzhen Nobel Prize Scientists Laboratory Project [C17783101]
Herein, we report a new type of efficient trifunctional electrocatalyst by in situ coupling amorphous cobalt nitride (CoNx) nanoparticles within three-dimensional (3D) nitrogen-doped graphene aerogel (NGA). The CoNx/NGA nanohybrid with hierarchical porous strucuture guarantees the superior activities toward ORR, OER and HER, due to abundant dual active CoNx. and NxC sites. Impressively, it also exhibits a long lifetime and exceptionally high electrochemical performances as a cathode and an anode in a two-electrode overall water splitting electrolyzer, and also as an air-cathode in a rechargeable Zn-air battery. In addition, the CoNx/NGA-based water splitting electrolyzer and two Zn-air batteries can be integrated together to effectively self-drive electrochemical water splitting device with high gas evolution rates of 186 and 372 mu mol h(-1) for O-2 and H-2, respectively. This work paves a way for designing advanced non-noble multifunctional catalysts, aiming for the real application of energy storage and conversion devices.
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