With the increasingly serious environmental problems and the rising energy crisis,it is urgent to use electrocatalysis technology to develop sustainable green new energy. Transition metal low-dimensional nanomaterials have large active surface,high electron transfer rate and abundant surface vacancies,which can effectively improve the efficiency and stability of electrocatalytic reactions. In this paper,the transition metal low-dimensional nanomaterials are classified based on the material dimension,and their advantages are clarified respectively. The research achievements of zero-dimensional,one-dimensional and two-dimensional nanomaterials in the field of electrocatalysis are mainly reviewed. The relationship between the structure of low-dimensional nanostructure and the activity,as well as stability of electrocatalysis,is revealed,and it is clear that low-dimensional nanomaterials are an effective method to improve the performance of electrocatalysis. Finally,it is pointed out that the structure of transition metal low-dimensional nanocatalysts should be rationally designed and optimized according to demand. The future development direction of low-dimensional nanocatalysts should be the combination of basic research and computational research,guide the design with theory,combine with machine learning to pre-select the appropriate structural model and further development towards improving existing materials and combining more and more efficient composite materials.
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