High activity methanol-resistance direct methanol fuel cell cathode catalyst and production method thereof

Abstract

The invention discloses a high-activity methanol-resistance direct methanol fuel cell cathode catalyst and a preparation method thereof. The activity composition of the catalyst is Cu / PtM, the carrier is a carbon nanotube, wherein, PtM is used for improving oxygen reduction activation and Cu is used for improving methanol-resistance performance. The preparation method is as follows: firstly, the carbon nanotube, the compounds of metal M, and platinic chloride solution are scattered in glycol ultrasonically, the pH value is adjusted, the temperature is increased and reflux is carried out, platinum based catalyst loaded by the carbon nanotube is prepared by filtering, washing and drying; then the prepared platinum based catalyst loaded by the carbon nanotube is scattered in the glycol and is added with copper sulfate, then the pH value is adjusted, the temperature is increased and the reflux is carried out, and then the platinum direct methanol fuel cell cathode catalyst loaded by the carbon nanotube coated with Cu is prepared by the filtering, washing and drying. The preparation method is simple, operational condition is mild and the controllability is good; besides, the catalyst prepared by the method has high oxygen reduction activation and good methanol-resistance performance.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a highly active methanol-resistant direct methanol fuel cell cathode catalyst and a preparation method thereof. Background technique [0002] Direct methanol fuel cell (DMFC) is a kind of proton exchange membrane fuel cell. It uses solid polymer membrane as electrolyte and directly uses methanol (liquid or gaseous) as fuel. It has abundant fuel sources, convenient storage, and no intermediate reforming Or conversion device, light weight, small size, high energy density, less environmental pollution, safe and simple operation, etc. Due to the many advantages mentioned above, it can be used in power supply, as a power supply for mobile phones and laptop computers, and has the potential to be used by specific end users in the future. Therefore, the research of DMFC has received extensive attention. [0003] At present, one of the important problems facing the developm...

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Problems solved by technology

[0006] But still can't meet the requirement

Chinese Invention Patent Publication No. CN100998948 discloses "Preparation Method of Oxygen Electroreduction Catalyst for Direct Methanol Fuel Cell". Metal clusters, the preparation of which requires the solid-state reaction of Se elemental elements at high temperatures, which is difficult to prepare and high in cost

Chinese Invention Patent Publication No. CN 101125296A discloses "a direct methanol fuel cell cathode catalyst and its preparation method". 2 SO 4 、H 2 PtCl 6 and Na 2 WO 4 In the mixed sol, at a constant potential, the basic structural formula is Pt-H obtained by electrodeposition on the carbonaceous material x WO 3 (0<x≤1) platinum-based composite catalyst, the preparation method of this patented catalyst is relatively simple, but the amount of active components supported by the constant potential deposition method is relatively small

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