Interface Engineering of MoS2 /Ni3 S2 Heterostructures for Highly Enhanced Electrochemical Overall-Water-Splitting Activity.
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 /Ni3 S2 heterostructures, in which abundant interfaces are formed. For OER, such MoS2 /Ni3 S2 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 /Ni3 S2 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.
Center for Advancing Electronics Dresden (cfaed) &, Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
Jian
J
Zhang
Leibniz-Institut für Katalyse, e.V., Universität Rostock, 18059, Rostock, Germany.
Tao
T
Wang
Institute for Metallic Materials, IFW Dresden, 01171, Dresden, Germany.
Darius
D
Pohl
Institute for Metallic Materials, IFW Dresden, 01171, Dresden, Germany.
Bernd
B
Rellinghaus
Center for Advancing Electronics Dresden (cfaed) &, Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
Renhao
R
Dong
Center for Advancing Electronics Dresden (cfaed) &, Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
Shaohua
S
Liu
Center for Advancing Electronics Dresden (cfaed) &, Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
Xiaodong
X
Zhuang
Center for Advancing Electronics Dresden (cfaed) &, Department of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany. xinliang.feng@tu-dresden.de.
Xinliang
X
Feng
electrocatalysts; interface engineering; molybdenum disulfide; nickel sulfide; water splitting