Hollow Chevrel-Phase NiMo3S4for Hydrogen Evolution in Alkaline Electrolytes.
Electrochemical water splitting to generate molecular hydrogen requires catalysts that are cheap, active, and stable, particularly for alkaline electrolyzers, where the cathodic hydrogen evolution reaction is slower in base than in acid even on platinum. Herein, we describe the synthesis of new hollow Chevrel-phase NiMo3S4and its alkaline hydrogen evolution reaction (HER) performance: onset potential of -59 mV, Tafel slope of 98 mV per decade, and exchange current density of 3.9×10-2mA cm-2. This Chevrel-phase chalcogenide also demonstrates outstanding long-term stability under harsh HER cycling conditions. Chevrel-phase nanomaterials show promise as efficient, low-cost catalysts for alkaline electrolyzers.
Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark, DE, 19716, USA.
Jun
J
Jiang
Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, 230026, China.
Minrui
M
Gao
Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark, DE, 19716, USA.
Wenchao
W
Sheng
Department of Chemical and Biomolecular Engineering, Center for Catalytic Science and Technology, University of Delaware, Newark, DE, 19716, USA.
Yushan
Y
Yan
NiMo3S4; alkaline hydrogen evolution; chevrel phase; electrocatalysts; water splitting