Method for preparing direct alcohol fuel cell graphene-based anode electro-catalyst

Abstract

The invention discloses a method for preparing a direct alcohol fuel cell graphene-based anode electro-catalyst. The method comprises the steps of sucking an electro-spinning solution into an injector, and performing electrostatic spinning, wherein the tip of the injector is connected with the anode of a direct-current high voltage power supply; and placing a rotary collecting plate connected with a direct-current high voltage cathode at a position 10-20 cm away from the vertical direction of the tip, applying 0-50 kV voltage, propelling the injector at the speed of 0.002-0.01 mm / s, and ejecting the electro-spinning solution from the tip of the injector under the actions of the high voltage electric field and self gravity of the solution to form a Taylor cone and arrive at the rotary collecting plate to form an anode electro-catalyst membrane, wherein the temperature in the electrostatic spinning process is 30-50 DEG C. The anode catalyst prepared by the method for preparing a direct alcohol fuel cell graphene-based anode electro-catalyst is of a membrane-like structure and distributed uniformly, simultaneously, the traditional powdery structure is simplified, the step of preparing a catalyst layer by complex coating in the traditional process is simplified, the anode catalyst has obvious advantages in comparison with the conventional fuel cell anode catalyst, and assembly of cells is simplified.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a method for preparing direct alcohol [0002] approach to graphene-based anode electrocatalysts for fuel cells. Background technique [0003] At present, the problem of environmental pollution is becoming more and more serious, and it is imminent to develop clean, efficient and recyclable new energy sources. Proton exchange membrane fuel cells have aroused people's research interest because of their pollution-free and high-efficiency power generation performance. As one of the proton exchange membrane fuel cells, the direct alcohol fuel cell also has the advantages of no pollution, no noise and high energy conversion efficiency in terms of power generation. However, the main component of the current catalyst is the noble metal platinum. The two problems of high cost and low life limit the wide-scale promotion of fuel cells to a certain extent, and the choice of carrier great...

AI Technical Summary

Problems solved by technology

The chemical reduction method is easy to operate and can be produced on a large scale, but since the formation of the metal is carried out in the liquid phase and on the surface of the carrier, the metal crystal nuclei randomly form catalyst particles on the surface of the carrier, so uneven distribution is prone to occur during the preparation process; and Reducing agents and organic solvents will reduce the activity of the graphene-nanoparticle binding interface, so the performance of the prepared composite material is not high

The preparation of catalyst nanoparticles by electrochemical deposition has the advantages of controllability, easy operation, and environmental protection. It is more and more widely used in the preparation of catalysts. Unreliable performance on graphene-coated surfaces

The sol-gel method is a very effective method for preparing thin film coating materials. The reaction temperature is low and it is easy to carry out. However, there are many interference factors in the process of sol forming, and the phenomenon of colloidal particle agglomeration is prone to occur.

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