posted on 2018-07-09, 00:00authored byYuyao Ji, Li Yang, Xiang Ren, Guanwei Cui, Xiaoli Xiong, Xuping Sun
It is attractive
to develop an effective bifunctional electrocatalyst
for full water splitting. In this Letter, we report that a NiWO4 nanowire array on a Ti mesh (NiWO4/TM) is a high-performance
and stable water-splitting electrocatalyst at alkaline pH. As a 3D
electrocatalyst, such a NiWO4/TM attains 20 mA cm–2 under overpotentials of 101 mV for cathodic water reduction and
322 mV for anodic water oxidation. We also demonstrate the use of
NiWO4/TM to make a two-electrode electrolyzer capable of
driving 20 mA cm–2 at a cell voltage of 1.65 V.