Xiang, QWang, JMiao, QTao, PSong, CShang, WDeng, TYin, ZongyouWu, J2024-01-292588-8420http://hdl.handle.net/1885/312393Electrocatalytic water splitting plays a paramount importance role in hydrogen production as a green renewable energy technology. Therefore, development of highly efficient and durable electrocatalysts for oxygen evolution reaction and hydrogen evolution reaction has gained great interest. Self-supported nanoarray electrocatalysts are attracting intense attention owing to larger active areas and lower reaction overpotential than the freestanding particles. Herein, the recent progress with regard to self-supported nanoarray electrocatalysts for water splitting is systematically overviewed, with a special focus on the morphology including 1D, 2D, and heterostructure nanoarrays, as well as the design and preparation strategy of the substrates. Furthermore, the challenges and opportunities of self-supported nanoarray electrocatalysts for water splitting are also discussed. Moreover, the promising application of self-supported nanoarray electrocatalysts in CO2 reduction reaction and nitrogen reduction reaction is also investigated.The work is sponsored by the National Key R&D Program of China (no. 2017YFB0406000), the National Science Foundation of China (21875137, 51521004, and 51420105009). Innovation Program of Shanghai Municipal Education Commission (project no. 2019-01-07-00-02-E00069), the 111 Project (project no. B16032), and the fund from Center of Hydrogen Science and Joint Research Center for Clean Energy Materials at Shanghai Jiao Tong University financial supports.application/pdfen-AU© 2021 The authorsSelf-supported nanoarraySubstrateOxygen evolution reactionHydrogen evolution reactionOverall water splitting202110.1016/j.mtnano.2021.1001202022-11-13