Abstract: With the advancement of carbon neutrality goalin China, the exploration and utilization of renewable energy has become a hot research topic, in which hydrogen production by electrolytic water as a green,large-scale production of H2 energy technology has attracted much attention.The process of water electrolysis mainly involves two half reactions, namely hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). At present, the efficiency of hydrogen production on a large scale is low, so the development of efficient catalysts to improve the efficiency of water electrolysis is the core to improve the efficiency of hydrogen production. High-efficiency electrocatalysts should have a large number of exposed active sites, high conductivity and long life.As the main site for catalytic reactions, the interface can be regulated to tailor the reaction path by adjusting the interfaceatomic arrangement and electronic structure. Interface engineering can modify the catalyst to obtain new physicochemical properties and excellent synergistic effects. Due to the increased density of active sites, the activity and stability of electrocatalysts can be greatly improved. Therefore, it is necessary to adjust the interface structure at the nanoscale to develop efficient electrocatalysts for water splitting.In this paper, three main interface structures and interface structure control strategies were reviewed, which could provide guide for interface structure control to enhance the electrocatalytic performance.

Key words: interface structure, water electrolysis, hydrogen evolution reaction, oxygen evolution reaction, catalyst