“…Nickel-based electrocatalysts are considered as a promising alternative to noble metal-based catalysts considering their low cost, competitive electrocatalytic activity and excellent catalytic stability, and thus have broad application prospects in urea-assisted water splitting for H 2 production. 24–28 In recent years, various strategies, such as interface engineering, defect engineering, and heteroatom doping, have been applied to simultaneously improve the interfacial charge transfer kinetics and active surface area of catalysts to enhance their catalytic activity. 22,29,30 The heterointerface effect can integrate the active centers of different components to form multi-site reaction pathways for promoting the cleavage of the HO–H bond and accelerate the Volmer step.…”