Monocrystal porous V2Se9 nanosheet array electro-catalysis material and preparation method thereof

Abstract

The invention discloses a monocrystal porous V2Se9 nanosheet array electro-catalysis material. A V2Se9 nanosheet array grows on a conductive substrate, and V2Se9 is of a monocrystal porous structure. A preparation method of the monocrystal porous V2Se9 nanosheet array electro-catalysis material comprises the following steps: preparing ammonium metavanadate solution with the concentration of 1-4 mol / L, adjusting pH to be 1-3, transferring the solution to a reaction still, putting a conductive substrate in the reaction still, sealing the reaction still, carrying out first-time hydrothermal reaction, growing an ammonium metavanadate nanosheet array on the surface of the conductive substrate, taking out the conductive substrate, washing the surface of the conductive substrate with deionized water, and drying the conductive substrate; calcining the treated conductive substrate in the first step in a muffle furnace to obtain a porous V2O5 nanosheet array; rapidly transferring prepared sodium hydrogen selenide solution to the reaction still, obliquely placing the obtained conductive substrate in the reaction still, sealing the reaction still, then, putting the reaction still in a blasting drying oven, and carrying out second-time hydrothermal reaction; and preparing the V2Se9 nanosheet array. The monocrystal porous V2Se9 nanosheet array electro-catalysis material reduces the hydrogen production cost and has the catalytic activity equivalent to that of platinum.

Description

technical field [0001] The invention relates to a single-crystal porous nonavanadium selenide nanosheet array electrocatalytic material, and also relates to a preparation method of the electrocatalytic material, which belongs to the field of catalysis. Background technique [0002] Energy and environmental issues in today's world have increasingly become bottlenecks restricting economic and social development. Due to its high calorific value and no environmental pollution during use, hydrogen energy is expected to be a promising energy source to replace fossil fuels. At present, the sources of hydrogen mainly include hydrogen production from fossil fuels, hydrogen production from photolysis of water, hydrogen production from biomass, and hydrogen production from electrolysis of water. Among them, hydrogen production by electrolysis of water is an important means that is green, environmentally friendly, easy to realize industrialization, and cheap. At present, platinum-base...

AI Technical Summary

Problems solved by technology

At present, platinum-based noble metal catalysts are the best hydrogen evolution catalysts, but their large-scale applications are largely limited due to their high cost.

In addition, due to the increase in energy consumption due to the existence of the overpotential of the hydrogen evolution reaction, in order to increase the reaction rate and reduce the overpotential, it is imminent to study and prepare high-efficiency hydrogen evolution reaction electrocatalysts.

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