Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof

The invention discloses a ternary carbon loaded palladium tin platinum nanoparticle catalyst and a preparation method thereof. The preparation method includes: dissolving a palladium-containing metal salt and a tin-containing metal salt in ethylene glycol, with the palladium and the tin being in an atom ratio of 1:1, adding a platinum metal salt, with the platinum atom and the palladium atom or the tin atom being in a ratio of 0.001:1-0.8:1, finally adding nanoscale carbon powder as a carrier of metal nanoparticles, conducting ultrasonic dispersion to obtain a uniform mixed solution, and then adding a sodium borohydride solution into the mixed solution in a dropwise manner, thus obtaining the highly dispersed ternary carbon loaded palladium tin platinum nanoparticle catalyst. In the invention, ethylene glycol is adopted as the solvent due to its high viscosity, so that the metal ion reduction and precipitation process can be more uniform, and palladium tin platinum nanoparticles with better dispersibility can be generated. The ternary palladium tin platinum nanoparticles prepared in the invention have a particle size of 2-5nm, and electrochemical tests show that the nanoparticles present obvious activity in electrocatalytic oxidation of ethanol and formic acid. The method provided in the invention is simple, and is suitable for large-scale preparation of anode catalyst materials for direct ethanol and formic acid fuel cells.