| AVS 59th Annual International Symposium and Exhibition | |
| Nanometer-scale Science and Technology | Wednesday Sessions |
| Session NS+AS+SS+SP-WeM |
| Session: | Nanoscale Catalysis and Surface Chemistry |
| Presenter: | N. Camillone, Brookhaven National Laboratory |
| Authors: | A. Bhattacharya, Brookhaven National Laboratory R. Palomino, Stony Brook University J.C. Lofaro, Stony Brook University H. Park, Brookhaven National Laboratory M.G. White, Brookhaven National Laboratory N. Camillone, Brookhaven National Laboratory |
| Correspondent: | Click to Email |
To date, time-resolved investigations of surface chemical reaction dynamics have almost exclusively been conducted on metal single crystals. However, current and proposed catalysts and photocatalysts generally consist of nanometer-scale metal particles supported on metal oxides. To conduct time-resolved investigations of the surface chemical dynamics of such systems we have synthesized and characterized arrays of palladium nanoparticles (approximately 4 to 10 nm in diameter) supported on clean rutile TiO2(110). We will present our synthetic approach and the results of chemical and morphological characterization and thermal chemistry experiments on these arrays. We will also discuss the results of subpicosecond-pulse photoinduced desorption of molecular oxygen and carbon monoxide, as well as the photoinduced bimolecular reaction between adsorbed atomic oxygen and carbon monoxide. Comparisons to the same reactions on single crystal Pd(111) surfaces will be made, and the unique features of the chemistry and dynamics at the nanoscale highlighted.