Highly dispersed carbon nanotube carried catalyst and preparation method of precursor thereof

Abstract

The invention discloses a simple and efficient method for preparing a highly dispersed carbon nanotube carried catalyst used in fuel cells, which belongs to the fuel cell technology and the nano-material preparation technology. The method is characterized by using a heterocyclic compound (furan, tetrahydrofuran, etc.) aprotic polar solvent to dissolve noble metal salt and transition metal salt and directly dispersing carbon nanotube carriers in the solution without carrying out functional treatment on carbon nanotubes, alternatively adding an ultrasonic dispersion solvent and a heating volatile solvent until obtaining mushy carbon mud, deoxidizing in an hydrogen atmosphere at a certain temperature after drying, and finally obtaining highly dispersed carbon nanotube noble metals and an alloy catalyst. The method of the invention is simple and easy, and the prepared carbon nanotube catalyst shows a high degree of dispersion, excellent electrocatalytic activity and good stability.

Description

technical field [0001] The invention relates to a simple and efficient method for preparing a highly dispersed carbon nanotube-supported catalyst for a fuel cell and a method for preparing a precursor of a highly dispersed carbon nanotube-supported catalyst, which belong to fuel cell technology and nanometer material preparation technology. The invention also relates to the highly dispersed carbon nanotube supported catalyst and its precursor prepared by the method. Background technique [0002] A fuel cell is an electrochemical device that directly converts the chemical energy in fuel into electrical energy. Because it is not limited by the Carnot cycle, has high energy conversion efficiency, and is environmentally friendly, it has attracted much attention. It is considered to be the preferred clean and efficient power generation method in the 21st century. [0003] There are many types of fuel cells, among which proton exchange membrane fuel cells have outstanding advanta...

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Problems solved by technology

Although the dispersibility of the catalyst on the surface of the carbon nanotubes is indeed improved after the acid treatment, the structural integrity of the carbon nanotubes is destroyed while the higher dispersibility is obtained, which also reduces the advantages of the stability of the carbon nanotubes as a carrier;

[0007] -Another way is to add a surfactant in the process of preparing the catalyst, and use the interaction between the surfactant and the carbon nanotubes to anchor the catalyst on the surface of the carbon nanotubes, but because the surfactant generally affects the activity of the catalyst Therefore, the catalyst must be washed, which not only increases the complexity of the catalyst preparation process, but also causes the loss of the catalyst during the washing process.

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