Abstract:

As an ideal secondary energy,hydrogen energy has the characteristics of high energy density,clean and pollution-free,and will play an extremely important role in the process of energy transition.Hydrogen production by water electrolysis is considered as the most promising green process for obtaining hydrogen energy,while high-efficiency electrocatalysts are the key to restrict the development of hydrogen production by water electrolysis.Noble metal catalysts have excellent electroca-talytic performance,but their promotion and application are severely restricted by the cost and reserves.Therefore,the devel-opment of low-cost and high-activity non-noble metal catalysts has gradually become a research hotspot.In order to improve the electrocatalytic performance of non-noble metal catalysts,a series of modification and optimization are needed.The research progress on the modification of non-noble metal catalysts for water electrolysis at home and abroad in recent years was reviewed.The modification methods of geometric construction（one-dimensional,two-dimensional,three-dimensional structure）and electronic regulation（composition optimization,crystal plane control,defect construction,heteroatom doping,etc.） were introduced in detail.The development direction of non-noble metal catalyst modification in future was also prospected.

Key words: water electrolysis, non-noble metal catalyst, geometric construction, electronic regulation