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Full Water Splitting Electrocatalyzed by NiWO4 Nanowire Array

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journal contribution
posted on 2018-07-09, 00:00 authored by Yuyao 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.

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