Multi-hole-and-shell nickel phosphide hollow microsphere and preparation method and application thereof

Abstract

A multi-hole-and-shell nickel phosphide hollow microsphere compound is provided with a multi-hole secondary nanostructure, and the chemical formula of the multi-hole-and-shell nickel phosphide hollow microsphere compound is Ni2P, wherein Ni to P is 2:1; the diameter of the microsphere is 1.5-2.5 [mu]m, and multi-hole shells are formed by assembling secondary nano particles being 12-17 nm; a solid phase phosphide multi-shell NiO precursor method is adopted for preparation of the multi-hole-and-shell nickel phosphide hollow microsphere compound, and a precursor NiO of the method is prepared through a self-template method; and a material can form a three-electrode system for testing of an electro-catalysis hydrogen evolution property of the material. The multi-hole-and-shell nickel phosphide hollow microsphere compound has the advantages that a multi-hole-and-shell hollow structure formed by assembling the nano particles is advantageous to interface contact of electrode gas-liquid-solid three phases, a better material conveying channel can be provided, and a structural unit of the nano particles can provide more catalytic active sites, so that electro-catalysis activity of the multi-hole-and-shell nickel phosphide hollow microsphere compound is effectively improved, and meanwhile, a product has good electrochemical stability and can serve as a novel catalyst to be applicable to electrolysed water and the like.

Description

technical field [0001] The invention relates to the preparation of a hydrogen evolution electrocatalyst, in particular to a porous multi-shell nickel phosphide hollow microsphere and its preparation and application. Background technique [0002] Energy and the environment are one of the most important issues involved in the sustainable development of human society. The depletion of fossil fuels and the severe environmental pollution caused by their use have also made the development of sustainable and pollution-free energy an important direction for research and development in the scientific community today. Hydrogen energy, as a clean energy with high energy density, has received extensive attention. Due to the abundant and pollution-free source of raw materials, hydrogen production by electrolysis of water is an important means to realize industrial and cheap production of hydrogen. At present, the most widely used catalysts for hydrogen production by electrolysis of wat...

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Problems solved by technology

So far, metal oxides of different compositions (eg: Co 3 o 4 , ZnO, Fe 3 o 4 ,TiO 2 , CuO, CoMn 2 o 4 etc.), sulfide (NiCo 2 S 4 etc.), porous multi-shell hollow structures such as silica and carbon have been prepared and reported, but metal phosphides with multi-shell hollow structures have not been reported yet.

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