Jian Zhang1, Tao Wang2, Darius Pohl3, Bernd Rellinghaus3, Renhao Dong⧫1, Shaohua Liu1, Xiaodong Zhuang1, Xinliang Feng1
1Center for Advancing Electronics Dresden (cfaed) & Department of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden Germany
2Leibniz-Institut für Katalyse, e.V. Universität Rostock 18059 Rostock Germany
3Institute for Metallic Materials, IFW Dresden. 01171 Dresden, Germany
Tóm tắt
AbstractTo 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.
