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- Title
Interface Engineering of MoS<sub>2</sub>/Ni<sub>3</sub>S<sub>2</sub> Heterostructures for Highly Enhanced Electrochemical Overall-Water-Splitting Activity.
- Authors
Zhang, Jian; Wang, Tao; Pohl, Darius; Rellinghaus, Bernd; Dong, Renhao; Liu, Shaohua; Zhuang, Xiaodong; Feng, Xinliang
- Abstract
To achieve sustainable production of H2 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 mA cm−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 mA cm−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.
- Subjects
HETEROSTRUCTURES; ELECTROCATALYSTS; WATER electrolysis; CHEMISORPTION; INTERMEDIATES (Chemistry); BIFUNCTIONAL catalysis
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 23, p6702
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201602237