Sintering-Resistant Metal Catalysts Supported on Concave-Convex Surface of TiO2 Nanoparticle Assemblies

Article abstract of DOI:10.1002/cctc.201800624

We herein describe a novel use of spherical nanoparticle assemblies of TiO₂ with ultrafine surface concave-convex structure as a catalyst support to prevent the sintering of dispersed metal nanoparticles. Owing to the unique surface structure derived from their fine primary particles, the TiO₂ nanoparticle assemblies show excellent dispersion ability of Au nanoparticles on their rough surface. Extremely exothermic CO oxidation as a probe reaction confirmed the high catalytic activity and stability of Au nanoparticles on the TiO₂ support and sintering resistance even after several cycles of the heat stress reaction at high temperatures.