By carefully adjusting the coordination environment and quantity of low-coordination atoms, nanomaterials' electrocatalytic performance may be improved. Through the control of electron transport characteristics, atomic arrangement, and molecule structure in a confined area, confinement engineering is the most effective method for the exact chemical production of electrocatalysts. It adjusts the generation of active centres by changing the coordination conditions, but it also controls the physicochemical characteristics of electrocatalysts. Therefore, in electrocatalysis, the nucleation, transportation, and stabilisation of intermediate species are improved, which enhances the performance in terms of activity, stability, and selectivity. In electrochemical processes, an electrocatalyst functions as a catalyst. Materials that function as catalysts alter and speed up chemical processes without being consumed in the process.