期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 23, 页码 6702-6707出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602237
关键词
electrocatalysts; interface engineering; molybdenum disulfide; nickel sulfide; water splitting
资金
- ERC Grant on 2DMATER
- EC under Graphene Flagship [CNECT-ICT-604391]
To achieve sustainable production of H-2 fuel through water splitting, low-cost electrocatalysts for the hydrogen-evolution reaction (HER) and the oxygen-evolution reaction (OER) are required to replace Pt and IrO2 catalysts. Herein, for the first time, we present the interface engineering of novel MoS2/Ni3S2 heterostructures, in which abundant interfaces are formed. For OER, such MoS2/Ni3S2 heterostructures show an extremely low overpotential of ca. 218 mV at 10 mAcm(-2), which is superior to that of the state-of-the-art OER electrocatalysts. Using MoS2/Ni3S2 heterostructures as bifunctional electrocatalysts, an alkali electrolyzer delivers a current density of 10 mAcm(-2) at a very low cell voltage of ca. 1.56 V. In combination with DFT calculations, this study demonstrates that the constructed interfaces synergistically favor the chemisorption of hydrogen and oxygen-containing intermediates, thus accelerating the overall electrochemical water splitting.
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