Preparation method for proton exchange membrane fuel cell catalyst

Abstract

The invention discloses a preparation method for a proton exchange membrane fuel cell catalyst. The adoption of a surfactant and a stabilizer is avoided, the preparation method is easy to operate, safe and convenient, and the preparation efficiency is greatly improved; acid is added as a precipitant, so that the precipitation time of the catalyst is greatly shortened, and the process efficiency is improved; a drying process of the catalyst is rapidly finished by a spray drying technology, and materials sprayed in the drying process are instantaneously heated by high temperature only when being sprayed into spray particles, so that the phenomenon of agglomeration of the catalyst is reduced, and the electrochemical activity of the platinum-carbon catalyst is kept high after the catalyst is dried; moreover, by the spray drying technology, the preparation time of the catalyst is further reduced, and the preparation method is easy to realize industrial production, and has broad market prospect.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a proton exchange membrane fuel cell catalyst, and belongs to the technical field of new materials. Background technique [0002] With the depletion of petrochemical energy and the increasing environmental pollution, people are paying more and more attention to the development and utilization of new energy. For many years, people have been trying to find energy utilization methods that have high energy utilization efficiency and do not pollute the environment. Among them, fuel cells are a new type of energy utilization methods that can directly convert chemical energy into electrical energy and have power generation efficiency. It is a new form of energy source with great development prospects. [0003] Proton exchange membrane fuel cell is a main force of fuel cell, and platinum carbon catalyst is one of its important components, accounting for about...

AI Technical Summary

Problems solved by technology

A kind of preparation method of Pt / C catalyst disclosed as Chinese patent CN103372429A, the catalytic active area of ​​the platinum-carbon catalyst prepared by the method is equivalent to that of the current commercial catalyst, yet, when the method prepares the catalyst, carbon black needs to be carried out For 2-6 hours of high-temperature calcination, after the reaction, the material needs to be placed for 2 days to allow the catalyst to settle, and then vacuum-dried for 4 hours. The time required to prepare a catalyst is too long and the efficiency is low, which is not conducive to the industrial production of the catalyst.

[0005] Chinese patent CN 1775362A discloses a preparation method for microwave synthesis of platinum / carbon nano-dot catalysts. The platinum nanoparticles in the synthesized Pt / C electrocatalyst have uniform particle size and good electrocatalytic performance. However, the preparation process The stabilizer is used in the process, which often makes it difficult to completely remove the stabilizer in the subsequent processing steps of the preparation process, and also makes the preparation process more complicated

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