Preparation method of vanadium-doped nickel phosphide composite nitrogen-sulfur double-doped reduced graphene oxide electro-catalytic material

Abstract

The invention discloses a preparation method of a vanadium-doped nickel phosphide composite nitrogen-sulfur double-doped reduced graphene oxide electro-catalytic material. The preparation method comprises the following steps: 1) grinding graphene oxide and L-cysteine; 2) putting a mixture ground in step 1) into a tubular furnace to prepare nitrogen-sulfur double-doped reduced graphene oxide; 3) preparing a nitrogen-sulfur double-doped reduced graphene oxide solution with the concentration of 0.5-1.0 mg / mL; 4) adding urea, NH4F, vanadium chloride and a nickel salt into the nitrogen-sulfur double-doped reduced graphene oxide solution, and stirring until a uniform solution is formed; 5) transferring the solution in step 4) into a reaction kettle to prepare a precursor NiV-LDH / NSG; and (6) putting the precursor NiV-LDH / NSG material and sodium hypophosphite into a tubular furnace together, heating to 300-400 DEG C, and keeping the temperature to obtain the vanadium-doped nickel phosphide composite nitrogen-sulfur double-doped reduced graphene oxide electrocatalytic material NiVP / NSG. The preparation method is low in cost and simple, and the obtained electro-catalytic material has good OER.

Description

technical field

[0001] The invention belongs to the field of material chemistry, in particular to a method for preparing a vanadium-doped nickel phosphide composite nitrogen-sulfur double-doped reduced graphene oxide electrocatalytic material. Background technique

[0002] With the aggravation of the global energy crisis and environmental pollution, the development of clean and renewable energy has become a problem that has attracted much attention and needs to be solved urgently. As a clean energy, hydrogen has the characteristics of high energy density, high conversion efficiency and no pollution. It provides convenience for meeting the huge energy demand in the future, and has been extensively studied. Electrocatalytic water splitting is an effective method for hydrogen production, and the whole reaction process consists of two half-reactions: oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Since the oxygen evolution reaction is a four-electron pro...

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