期刊
ADVANCED MATERIALS
卷 29, 期 47, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201704681
关键词
interface catalysis; oxygen vacancies; porous nanowires; water splitting; Zn-air batteries
类别
资金
- National Natural Science Foundation of China [21571089, 51671003, 51571125, 41573128, 91545107, 21773032, 21505062]
- National Key Research and Development Program of China [2016YFB0100201]
- Peking University
- Young Thousand Talented Program
- Fundamental Research Funds for the Central Universities [lzujbky2016-k02, lzujbky-2016-k09, lzujbky-2016-38, lzujbky-2017-it42]
- Shanghai Pujiang Program [15PJ1400500]
- Shanghai Chen Guang project [14CG02]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institute of Higher Learning
The development of highly active and stable oxygen evolution reaction (OER) electrocatalysts is crucial for improving the efficiency of water splitting and metal-air battery devices. Herein, an efficient strategy is demonstrated for making the oxygen vacancies dominated cobalt-nickel sulfide interface porous nanowires (NiS2/CoS2-O NWs) for boosting OER catalysis through in situ electrochemical reaction of NiS2/CoS2 interface NWs. Because of the abundant oxygen vacancies and interface porous nanowires structure, they can catalyze the OER efficiently with a low overpotential of 235 mV at j = 10 mA cm(-2) and remarkable long-term stability in 1.0 m KOH. The home-made rechargeable portable Zn-air batteries by using NiS2/CoS2-O NWs as the air-cathode display a very high open-circuit voltage of 1.49 V, which can maintain for more than 30 h. Most importantly, a highly efficient self-driven water splitting device is designed with NiS2/CoS2-O NWs as both anode and cathode, powered by two-series-connected NiS2/CoS2-O NWs-based portable Zn-air batteries. The present work opens a new way for designing oxygen vacancies dominated interface nanowires as highly efficient multifunctional electrocatalysts for electrochemical reactions and renewable energy devices.
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