Nickel-based catalyst of special hydrogen used for preparing fuel cell and preparation method

Abstract

The invention relates to a nickel-based catalyst of special hydrogen used for preparing a fuel cell and a preparation method. The nickel-based catalyst is composed of a core layer and a shell layer. The core layer is integrally formed through a base metal material and a nickel boride nanometer wire, and an amorphous phase nickel borate nanometer array is adopted as the shell layer. The preparationmethod comprises the following steps that 1, the nickel boride nanometer wire is prepared; the surface of the base metal material is covered with an aluminum oxide mask plate, the nickel nanometer array is deposited on the nickel piece base in advance through a vacuum evaporation coating method, after depositing is carried out for 25-35 minutes, boron hydride gas is introduced to grow the nickelboride nanometer wire in an epitaxial manner, after boron hydride gas is introduced, depositing is carried out, the base metal material is taken out, and the mask plate is stripped off to obtain the core layer for standby; and 2, the nickel borate-nickel boride hydrogen manufacturing catalyst for the core and shell structure is prepared, protective gas is used for loading boric acid steam to carryout annealing on the core layer to generate the amorphous phase nickel borate nanometer array, and the nickel borate-nickel boride catalyst of the core and shell structure is prepared and obtained.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a nickel-based catalyst used to prepare hydrogen for fuel cells, a preparation method and application. Background technique [0002] Hydrogen energy is the energy produced by the reaction of hydrogen and oxygen. Hydrogen energy is the chemical energy of hydrogen. Hydrogen mainly appears in the form of a combined state on the earth. It is the most widely distributed substance in the universe. It constitutes 75% of the mass of the universe. It is a secondary energy source. There are many ways to produce hydrogen in industry, such as water electrolysis hydrogen production, coal gasification hydrogen production, heavy oil and natural gas steam catalytic conversion hydrogen production, etc., but the energy consumed by these reactions is greater than the energy produced. The main advantages of hydrogen energy are: high combustion calorific value, the heat generated by burning the sa...

AI Technical Summary

Problems solved by technology

Noble metals and oxides such as Pt and Ru have high electrocatalytic activity for hydrogen evolution reaction and oxygen evolution reaction, but their limited reserves, high price, and poor stability hinder their large-scale production and application.

Nickel boride has an excellent catalytic effect as a catalyst for electrolytic hydrogen production, but its application in industrial production is greatly limited due to its easy reaction with carbon dioxide and hot water vapor, resulting in deactivation