Water Oxidation By Amorphous Iridium Oxide: A Novel Synthesizing Method, Toward Industrial Applications

摘要

Water-splitting for hydrogen production has been recognized as a promising approach for storage sustainable energy. To make this technology economically competitive, it is critical to find an efficient and scalable synthesis method to develop a robust water-oxidizing catalyst (WOC), since the performance of electrolyzers is limited by water-oxidation reaction (WOR). Herein, an approach to synthesis highly active WOC with a one-step, low-cost, environmentally friendly, and accessible method by operating metallic iridium as the anode electrode in a two-electrode system and at a relatively high potential is presented. The obtained IrO_x shows an overpotential of only 250 mV at 10 mA.cm~(-2) in 0.1 M HCIO_4 and remains stable under electrochemical conditions. Various characterization analyses are used to identify the structure and morphology of synthesized iridium oxide/iridium, indicates that the final product is a porous amorphous IrO_x/Ir interface. The synthesis method can inspire a variety of opportunities to design and synthesize efficient metal oxide-based electrocatalysts for sustainable energy conversion and utilization.