LAUSR

It is of great meaning to design highly efficient electrocatalysts for water electrolysis with abundant-earth elements instead of precious metals to realize the sustainable development. Herein, Mo-doped NiFe LDH/NiSe heterostructure (Mo-NiFe LDH/NiSe) was fabricated by coupling Mo-doped NiFe LDH and NiSe on nickel foam. The heterostructure showed ultra-low overpotential (250 mV) and remarkable durability at 150 mA cm -2 . Both theoretical and experimental results proved that Mo doping and interfacial synergism caused the interfacial charge redistribution induced, as well as the lifted d-band center to reduce 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. This work provides a facile and novel strategy to synergistically trigger oxygen evolution reaction (OER) process by transition metal doping and heterostructure for electronic modulation and surface reconstruction.