Research progress of electrode surface wettability adjustment applied to electrolytic water

• 1、The College of Materials Science andTechnology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211100, China

Abstract：As a green and pollution-free energy conversion technology, water splitting can produce hydrogen energy efficiently with water as raw material, which has attracted extensive attention of researchers. However, the reaction kinetics of the two half reactions of water splitting, oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is extremely slow, so efficient catalysts are needed to accelerate the reaction. In addition to extensive research on the types of catalysts, the electrode surface with special wettability can provide new design ideas for solving the problem of gas diffusion in gas evolution reaction. More and more people begin to pay attention to the regulation of gas transmission/diffusion behavior in the process of electrocatalytic reaction. To form a catalytic system with high reaction rate and excellent long-term stability. This review will briefly introduce the basic principle of electrode wetting state in air/water, discuss the current progress of wettability related design principles of two gas evolution reactions in the process of electrolytic water, summarize the existing problems and prospects for the future.

Keywords： apllied chemistry water splitting oxygen evolution reaction hydrogen evolution reaction electrode surface wettability regulation