Tuning Interfacial Electron Transfer by Anchoring NiFe-LDH on In-situ Grown Cu2O for Enhancing Oxygen Evolution

Interfacial electron transfer within the electrode is crucial for various electrocatalytic reactions. Herein, we demonstrated that in-situ grown Cu2O on Cu foam as a scaffold to load active ingredients could lower the interfacial contact resistance and promote the electron transfer in oxygen evolution reaction. Meanwhile, the Cu2O/Cu (CCF) facilitates to load active components due to higher surface area resulting from its irregular scattered structure. As a demonstration, Ni-Fe doubles layered hydroxide (NiFe-LDH) coated carbon nanotube spheroidal particles (CNS@NiFe) was anchored by a drop-casting route to assemble CNS@NiFe/CCF hybrid electrodes with the CCF as scaffolds. The CNS@NiFe/CCF electrode afforded an ultralow overpotential of 248 mV at 10 mA cm(-2) and a small Tafel slope of 32.9 mV dec(-1) with an excellent stability. Graphic Schematic illustration of CNS@NiFe/CCF architecture. [GRAPHICS] .