Special non-noble metal hydrolysis hydrogen production catalyst for fuel cells and preparation method

Abstract

The invention provides a special non-noble metal hydrolysis hydrogen production catalyst for fuel cells and a preparation method. The preparation method comprises the following steps: after uniformlymixing L-cysteine, melamine and ammonium molybdate, carrying out vacuum presintering; then calcining by using a hot isostatic-pressure sintering furnace; under the combined action of high temperatureand balanced high-pressure gases in various directions, carbonizing molybdenum oxide particles to generate molybdenum carbide; and converting carbon nitride into a porous carbon material so as to obtain the hydrolysis hydrogen production catalyst. According to the method, through vacuum pre-sintering and a hot isostatic-pressure process, the prepared catalyst is large in grain size, small in poresize and high in relative density and hardness, the prepared catalyst is a nitrogen and sulfur doped carbon material and has a porous structure, ultra-high-density molybdenum carbide particles are embedded in the porous carbon structure to form a composite material, hydrolysis hydrogen production mechanical property is good, and the stability is also good. The special non-noble metal hydrolysis hydrogen production catalyst for fuel cells is suitable for preparation of special hydrogen for fuel cells.

Description

technical field [0001] The invention relates to the field of hydrogen production by hydrolysis, in particular to the preparation of catalysts, in particular to a catalyst for hydrogen production by hydrolysis of non-noble metals for fuel cells and a preparation method. Background technique [0002] Hydrogen is a renewable secondary energy source with high calorific value and fast reaction speed, and can be produced through various reaction pathways. The by-product of hydrogen after releasing energy is water, which is friendly to the environment. Although hydrogen energy has not been widely used at present, hydrogen is hailed as a promising energy source to reduce our dependence on fossil fuels, reduce emissions of greenhouse gases and other toxic gases, and benefit the environment. Research and development of hydrogen energy But it is of great significance. There are many ways to produce hydrogen, which can be obtained by reforming, decomposing, photolyzing or hydrolyzing ...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems that the currently widely used molybdenum carbide catalysts for hydrolysis hydrogen production have polymerization phenomenon after high temperature treatment, large size and small specific surface area, unsatisfactory effect of hydrolysis hydrogen production, poor stability, etc., the present invention proposes a special catalyst for fuel cells. Non-precious metal hydrolysis hydrogen production catalyst and preparation method, thereby effectively controlling the size of molybdenum carbide, the obtained molybdenum carbide catalyst has a large specific surface area, good hydrolysis hydrogen production effect, and stable performance