 The hydrogen evolution reaction, HER, is a half-cell reaction in water electrolysis used to produce hydrogen gas. In industrial water electrolysis, the HER is often conducted in alkaline media due to its lower cost and greater stability of the electrodes. However, the kinetics of the HER in alkaline medium is slower than in acidic solutions due to the low concentration of protons in the former. To address this issue, researchers have developed heterostructured catalysts which combined two or more different materials into one structure. These catalysts have shown promising results in terms of increasing the reaction rate and efficiency compared to traditional platinum-based catalysts. Additionally, these catalysts have been found to be more stable in alkaline environments, making them ideal candidates for use in industrial applications. This article was authored by Juming Wei, Min Xiu, An Chuen Long and others.