Developing user-friendly electrodes for efficiently producing hydrogen from water to substitute non-renewable fossil fuels is one of the challenges in the hydrogen energy *** the first time,we have prepared self-suppo...
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Developing user-friendly electrodes for efficiently producing hydrogen from water to substitute non-renewable fossil fuels is one of the challenges in the hydrogen energy *** the first time,we have prepared self-supporting ultrahigh porosity cobalt foam loaded with NiCoP/NiOOH nanoflowers(NiCoP/CF)via freeze-drying and *** as-prepared hierarchical NiCoP/CF electrodes showed superior catalytic activity for hydrogen evolution reaction(HER)in alkaline *** one resulted from phosphorization at 350℃(NiCoP/CF-350)only required overpotential of-47,and-126 mV to deliver geometrical current density of-10 mA cm^(-2) and-100 mA cm^(-2),respectively,demonstrating improved catalytic activity than the electrodes prepared using a commercial nickel foam as a ***,it could retain its superior stability at a current density higher than-500 mA cm^(-2) for 16 *** an outstanding performance can be attributed to the ultrahigh porosity of Co foam support,optimal adsorption energies of HER intermediates(H^(*)),facile water dissociation on the NiCoP/NiOOH heterointerfaces,and the assistance of NiOOH facilitating the electrons transfer from the Co foam inside to the NiCoP *** work would provide a new strategy for future design of advanced HER electrocatalysts.
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