The invention provides a method for preparing a
cathode catalyst of a
proton exchange membrane fuel
cell, and relates to the preparation of a
cathode catalyst of a Pt based unary
proton exchange membrane fuel
cell. The method is characterized in that: a carbon nanometer
pipe is loaded with Pt to generate the catalyst; and by adjusting the initial concentration of a precursor, the ratio of a
reducer to the precursor, the ratio of the
reducer to OH- and the adding mode of the precursor, lowering the reduction temperature and the like, the Pt / CNTs
cathode catalyst, of which the metallic particles are highly dispersed, nanometer-scaled and uniform in size, is prepared. In the method, the pretreatment on the metallic precursor and any surfactant or other protectants are unnecessary, and the catalyst can be directly reduced at a low temperature, so that the reducing activity of the catalyst on
oxygen is greatly improved, and the
utilization rate of the catalyst is further improved; moreover, the preparation process is easily operated, and the prepared products can be used as the
cathode catalyst and the
anode catalyst of other
fuel cells, and also can be applied in the fields of gas reforming,
cracking of organic matters, treatment of pollutants and the like.