We describe a method for the preparation of high densities of model catalysts on highly oriented pyrolytic graphite surfaces. The model catalysts consist of transition metal nanoparticles that selectively decorate nanoparticles of a metal oxide support. High densities of a variety of metal oxide nanoparticles can be generated on HOPG by physical vapor deposition of the metal in an oxidizing environment onto hot HOPG surfaces. Transition metal nanoparticles can then be selectively deposited onto metal oxide nanoparticles using photoelectrochemical methods using band gap radiation that excites electron-hole pairs in the metal oxide. This talk will focus on results for Pt/TiO2, and Pt/FexOy systems and recent results for Cu/TiO2 nanoparticles. In addition to SEM and TEM, Synchrotron based ambient pressure XAS and XPS experiments have been used to characterize the nanoparticle systems. Synchrotron based ambient pressure experiments have also been used to study the chemistry of water, CO, and CO2 on these systems.

Metal nanoparticles on metal-oxide nanoparticle supports as model catalysts

253rd National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.