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The cactus-like heterojunction with FeOOH nanosheets wrapped on CoB2O4 nanorod/nickel foam (CoB2O4@FeOOH/NF) was fabricated by hydrothermal and electrodeposition strategy for OER process. Benefiting from the cactus-like architecture for fast mass...

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It is of great significance to design highly efficient electrocatalysts with abundant earth elements instead of precious metals for water splitting. Herein, Mo‐doped NiFe‐layered double hydroxides/NiSe heterostructure (Mo‐NiFe LDH/NiSe) was fabricated by coupling Mo‐doped NiFe LDH and NiSe on nickel foam (NF). The heterostructure electrocatalyst showed ultra‐low overpotential (250 mV) and remarkable durability for oxygen evolution reaction (OER) at 150 mA cm−2. Both theoretical and experimental results confirmed that Mo doping and interfacial synergism induced the interfacial charge redistribution and the lifted d‐band center to weaken the energy barrier (EB) of the formation of OOH*. Mo doping also facilitated the surface reconstruction of NiFe LDH into Ni(Fe)OOH as the active sites under electro‐oxidation process. This work provides a facile strategy for electronic modulation and surface reconstruction of OER electrocatalyst by transition metal doping and heterostructure generation.

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