Electrocatalytic water splitting is considered as the next-generation strategy for large-scale ultrapure hydrogen production. However, the high thermodynamic potential (1.23 V vs. the reversible hydrogen electrode) and slow kinetics of the anodic oxygen evolution reaction (OER) restrict the wide application of electrocatalytic water splitting. Replacing OER by hydrazine oxidation reaction (HzOR) with lower oxidizing potential can effectively increase the energy efficiency and save the cost of production. Thus, for the hydrazine-assisted electrolytic hydrogen production, transition-metal-based (TM-based) materials are developed to work as efficient electrocatalysts, due to the facile tuning of their physicochemical properties and their low costs. In this review, we summarize the latest advances on the TM-based catalysts for hydrazine-assisted hydrogen production, with focus on the catalytic properties and mechanisms. Moreover, several key issues of the hydrogen production process and perspectives are discussed to give insight into the foundation for the future development of hydrazine-assisted electrolytic hydrogen production.

电催化水分解被认为是大规模超纯氢生产的下一代策略。但是，高的热力学势能（相对于可逆氢电极为1.23 V）和阳极氧放出反应（OER）的慢动力学限制了电催化水分解的广泛应用。用肼氧化反应（HzOR）取代具有较低氧化电位的OER可以有效提高能源效率并节省生产成本。因此，对于肼辅助的电解氢生产，由于容易调节它们的理化性质和低成本，因此开发了基于过渡金属的材料（TM-based material）作为有效的电催化剂。在这篇评论中 我们总结了基于TM的肼辅助制氢催化剂的最新进展，重点是催化性能和机理。此外，还讨论了制氢过程中的几个关键问题和观点，以洞悉肼辅助电解制氢的未来发展基础。