A universal approach to the preparation of colloidal mesoporous platinum nanoparticles with controlled particle sizes in a wide range from 20 nm to 200 nm

We report a universal method for the preparation of mesoporous Pt nanoparticles (MPNs) with tunable particle sizes. MPNs with various particle sizes are simply prepared by changing the surfactant concentration in the starting solutions. Small-sized MPNs show the highest electrochemical surface area and highest current density in the methanol oxidation reaction.