Catalysis is a critical technology for solving the global challenges of environmental problems and limited energy sources. Especially, Strong metal�support interactions are a key issue in determining the catalytic performance of heterogeneous catalysis. Here, we investigated the support effect in two-dimensional Pt nanocatalysts on reducible metal oxide supports under catalytic reaction. Several reducible metal oxide supports, including CeO2, Nb2O5, and TiO2 thin films, were prepared via the sol-gel process. The Langmuir�Blodgett technique and arc plasma deposition (APD) process were employed to obtain Pt nanoparticle arrays with and without capping layers, respectively, on an oxide substrate. We found that reducible metal oxide supports have a uniform thickness under 50nm and crystalline structure after annealing, and exhibit a bandgap of 3.2�3.8 eV. We tested the catalytic activity of CO oxidation over Pt nanoparticles supported on metal-oxide thin films under 40 torr CO and 100 torr O2. Pt catalysts exhibited the better performance on the CeO2 , Nb2O5 , TiO2 and SiO2 in sequence for both the colloidal and APD Pt nanoparticles. These catalytic behavior show a strong support effect on the catalytic performance of two-dimensional Pt nanocatalysts on oxide substrates under CO oxidation, with possible applications of tunning catalytic activity via engineering metal�oxide interfaces.

Strong metal-support interaction effect on the catalytic activity of 2D Pt nanoparticle arrays on oxide thin films

248th National Meeting (2014)

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