Process for preparing catalyst of fuel battery with proton exchange membrane

Abstract

A catalyst for the fuel battery with proton exchange membrane is prepared through adding catalyst precursor to carbon powder suspension, adding alkali to regulate pH value to 4-9, low-temp vacuum drying to obtain component A, adding solid reducing agent to the A, grinding until solid-phase reaction to adsorb metal salt microparticles to carbon carrier, alkali washing, pickling, washing in water and drying to obtain powdered catalyst carried by carbon powder.

Description

1. Technical field [0001] The invention is a proton exchange fuel cell catalyst, which belongs to the technical field of catalyst manufacture. 2. Background technology [0002] Due to the advantages of high energy conversion efficiency and low environmental pollution, fuel cells will become the best "clean energy" in the future, and many governments attach great importance to their research. In particular, the proton exchange membrane fuel cell has attracted extensive attention in recent years because it can be used as a power source for electric vehicles and a portable mobile power source. The research work of proton exchange membrane fuel cells is currently focused on the research of catalysts, and the multi-catalyst system of Pt or Pt+ other metals is the most effective catalyst for proton exchange membrane fuel cells. However, due to the extremely expensive price of these metals and limited resources , so that the battery is expensive and difficult to commercialize. The...

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Problems solved by technology

However, due to the traditional preparation methods, such as: liquid-phase chemical reduction, electrochemical deposition, high-temperature vapor deposition, etc., there are some factors that are not conducive to improving the performance of the catalyst, such as intense Brownian motion in the liquid-phase system; high temperature Particle agglomeration under certain conditions, etc. These factors often cause the diameter of catalyst particles to be larger, and at the same time, the particles are prone to agglomeration, thereby reducing the catalytic performance of the catalyst.

However, by changing the working conditions of the battery and the preparation method of the electrode, the performance of the proton exchange membrane fuel cell catalyst cannot be fundamentally improved. Therefore, finding a more suitable catalyst preparation method has become an urgent task in the current fuel cell research work.