Synthesis of Self-Supported Amorphous CoMoO₄ Nanowire Array for Highly Efficient Hydrogen Evolution Reaction

Water electrolysis is known as the most environmental friendly and renewable technology to generate hydrogen. To make it more energy-efficient, development of a promising cathodic hydrogen evolution reaction electrocatalyst is important. In this communication, amorphous CoMoO 4 nanowire array on Ti mesh (CoMoO 4 NWA/Ti) was synthesized via a simple two-step hydrothermal method. As a three-dimensional hydrogen-evolving electrode, CoMoO 4 NWA/Ti shows superior catalytic activity in 1.0 M KOH and demands overpotentials of only 81 and 243 mV to achieve current densities of 10 and 100 mA cm –2, respectively. Remarkably, it also has long-term electrochemical durability.