Preparation method of fuel-cell catalyst with high utilization rate

The invention provides a preparation method of a fuel-cell catalyst with high utilization rate, aiming to overcome the defect of low utilization rate of the catalyst in the traditional proton exchange membrane fuel cell. The preparation method comprises the following steps of: firstly, brominating and sulfonating to lead sulfonic groups with the proton conduction capability into a carbon nano tube so that the carbon nano tube has the proton and ion conduction capability; then depositing platinum nano particles on the carbon nano tube through a chemical reduction method to enable each platinumparticle to be located at a three-phase interface on which the fuel cell reacts so as to realize the aims of improving the utilization rate of the fuel-cell catalyst and reducing platinum-loading amount. The catalyst prepared by the method can be applied to the fuel cell which takes a proton exchange membrane as an electrolyte, such as catalysts of an oxygen-hydrogen proton exchange membrane fuelcell and a direct methanol fuel cell. According to the preparation method provided by the invention, the prepared fuel cell can be widely applied to electric automobiles, various spacecrafts, portable electronic equipment, such as cameras, notebook computers, electronic toys and the like.