 The Hydrogen Evolution Reaction, HER, is a half-cell reaction in water electrolysis that produces hydrogen gas. In industrial water electrolysis, alkaline media is often used to achieve higher stability of the electrode materials, but the kinetics of the HER in alkaline medium is slow due to low proton concentration. Heterostructured catalysts with synergistic effects from heterogeneous interfaces can provide multiple functional sites for the overall reaction process and have shown potential to break through bottlenecks. This review summarizes recent hetero-structured HER catalysts for alkaline medium, focusing on approaches to enhance the reaction rate by accelerating the Volmer step. The aim is to provide an overview of current developments in alkaline HER catalysts and design principles for future development of nano or micro-sized electro-catalysts. This article was authored by Juman Wei, Min Zhou, An Chuan Long and others.