LAUSR

Abstract Developing highly efficient and stable water oxidation catalysts based on abundant metallic elements is a challenge that must be met to fulfill the promise of water splitting for clean energy production. In this work, we developed an oxygen evolution reaction catalyst consisting of a nanostructured film electrodeposited from a phosphate buffer solution (0.2 mol/L, pH = 12.0) containing Cu-tricine complex. A Tafel plot showed that the required overpotential for a current density of 1.0 mA/cm2 was only 395 mV and the Tafel slope was 46.7 mV/decade. In addition, the Cu-tricine film maintained a stable current density of 7.5 mA/cm2 for the oxygen evolution reaction in phosphate buffer solution for 10 h, and a Faradaic efficiency of 99% was obtained.