Metal tungstate dominated NiCo2O4@NiWO4 nanorods arrays as an efficient electrocatalyst for water splitting

One of the most promising ways to produce high purity hydrogen is electrocatalytic water splitting, the slow rate of oxygen evolution reaction (OER) limited the whole water splitting process under alkaline conditions. Here, NiCo2O4@NiWO4/NF is firstly acted as a metal tungstate dominated bifunctional water splitting catalyst, which a very low cell voltage of 1.59 V is obtained with 10 mA cm(-2) in alkaline media. Remarkably, the catalytic performance of NiCo2O4@NiWO4/NF is also kept for at least 12 h, which shows long time electrochemical stability. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.