Uniform Pt nanoparticles supported on urchin-like mesoporous TiO hollow spheres as stable electrocatalysts for the oxygen reduction reaction.

In order to promote the commercial application of proton exchange membrane fuel cells, it is of great importance to develop Pt-based electrocatalysts with high activity and stability for the oxygen reduction reaction (ORR). Here, urchin-like mesoporous TiO hollow spheres (UMTHS) with a high specific surface area (167.1 m g) and improved conductivity were designed and applied as supports to disperse Pt nanoparticles (NPs) for the first time.