White, Michael G. - Stony Brook University

个人简介

B.S., 1974, University of Pittsburgh Ph.D., 1979, University of California Research Associate, University of British Columbia, Vancouver, Canada, 1979-80 Senior Chemist, Brookhaven National Laboratory, 1995-present Chair, Chemistry Department, Brookhaven National Laboratory, 2000-2001 Professor, SUNY Stony Brook, 2001-present

研究领域

Dynamics at Surfaces Our research is aimed at providing a molecular level understanding of the energetics, dynamics and morphology-dependence of elementary surface reactions that play key roles in energy-related catalysis. Specifically, we are interested in systems involving simple feedstock chemicals (e.g., H2, CO, CO2, O2, CH4), the selective oxidation of C1 and C2 molecules (e.g., CH3OH, C2H4) and reaction systems that have environmental impact (e.g., De-NOx, De-SOx). We approach these problems from a chemical physics perspective in which experiments are designed to probe the adsorbate-metal potential surface and the dynamical paths that lead to reaction. Our experimental program makes extensive use of lasers for both state-selective detection of desorbed products and the photo-initiation of surface processes such as desorption, diffusion, dissociation and reaction. Current studies are focused on understanding the photoinduced reactions on semi-conducting surfaces such as titania (TiO2); whose photoactivity is widely used for removing organic pollutants from air and water, for anti-fogging and self-cleaning surfaces and as a potential photocatayst for solar water splitting. Catalysis on the Nanoscale We are interested in understanding how the physical (size, structure) and chemical environment (support, pressure) of nanostructured catalysts effects their activity for heterogeneous reactions important in energy-related catalysis. Systems include noble metal (Cu, Au, Rh, Pd) nanoparticles supported on metal oxide (titania, ceria) surfaces for hydrogen production through the water-gas-shift reaction (CO + H2O ® CO2 + H2) as well as the synthesis of liquid fuels such as ethanol from renewable sources of hydrogen (nuclear, solar electrolysis) and CO2 from biomass or fossil fuel combustion. We are also investigating small nanoclusters of metal sulfides and carbides as possible replacements for the more expensive and rare noble metals for some catalysis applications. A major part of this effort is the development of techniques for preparing supported nanoparticles with narrow size-distributions and controlled chemical composition, e.g., metal to sulfur ratio. Methods include a novel size-selective cluster deposition apparatus, reactive metal evaporation and polymer-based micelle methods. Recent experiments have focused on the desulfurization reactions on small nanoclusters of molybdenum sulfide, MxSy, supported on Au(111) and Al2O3 surfaces in which the clusters are mass-selected before deposition which precisely fixes their size, structure and chemical composition.

近期论文

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Dissociation of OCS on the Mo6S8+ Cluster Supported on Au(111), M. J. Patterson, Y. Choi, P. Liu, and M. G. White, J. Am. Chem. Soc., submitted. Final State Distributions of O-2 Photodesorbed from TiO2(110), D. Sporleder, D. Wilson M. G. White, J. Phys. Chem. C, 113, 13180-13191 (2009). Adsorbate-Driven Morphological Changes of a Gold Surface at Low Temperatures, J. Hrbek, F. M. Hoffmann, J. B. Park, Ping Liu, D. Stacchiola, Y. Soo Hoo, S. Ma, A. Nambu, J. A. Rodriguez, and M. G. White, J. Am. Chem. Soc. 130, 17272-17273 (2008). Structure of Molybdenum and Tungsten Sulfide MxSy+ Clusters: Experiment and DFT Calculations, M. Patterson, J. M. Lightstone, and M. G. White, J. Physical Chemistry A 112, 12011-12021 (2008) Characterization and Reactivity of the Mo4S6+ Cluster deposited on Au(111) by Size-Selected Deposition, J. M. Lightstone, M. Patterson, J. Lofaro, P. Liu and M. G. White, J. Physical Chemistry C, 112, 11495–11506 (2008). In situ Time-resolved Characterization of Novel Cu-MoO2 Catalysts during the Water-Gas Shift Reaction, W. Wen, J. Liu, M. G. White, N. Marinkovic, J. C. Hanson, and J. Rodriguez, Catal. Letters, 113, 1-7 (2007). Gas Phase Reactivity of the Ti8C12+ Met-car with Tri-atomic Sulfur Containing Molecules: CS2, SCO, and SO2, J. M. Lightstone, M. J. Patterson, P. Liu, and M. G. White, J. Phys. Chem. A 110, 3505-3513 (2006). Gas-phase Interaction of Thiophene with the Ti8C12+ and Ti8C12 Met-Car Clusters," P. Liu, J. J. Lightstone, M. J. Patterson, J.A. Rodriguez, J. T. Muckerman and M. G. White, J. Phys. Chem. B 110, 7449-7455 (2006). The Reactions of Cyclohexene on Au(111)-Supported Molybdenum Carbide Nanoparticles, D. V. Potapenko, J. Horn and M. G. White, Journal of Catalysis 236, 346-355 (2005). Reactivity of M4S6+ (M-Mo, W) Cluster with CO and NH3 in the Gas-Phase, J. M. Lightstone, M. J. Patterson and M. G. White, Chem. Phys. Lett. 413, 429-433 (2005). The Characterization of Molybdenum Carbide Nanoparticles Formed on Au(111) using Reactive-Layer Assisted Deposition, J. M. Horn, Z. Song, D. V. Potapenko, J. Hrbek and M. G. White, J. Chem. Phys. B (Communication) 109, 44-47 (2005). Reactivity Studies with Gold-Supported Molybdenum Nanoparticles, D. V. Potapenko, J. M. Horn, R. J. Beuhler, Z. Song and M. G. White, Surf. Sci. 574, 244-258 (2005). State-resolved dynamics of oxygen atom recombination on polycrystalline Ag, R.J. Beuhler and M. G. White, J. Chem. Phys., 120, 2445 (2004). Gas-Phase Production of Molybdenum Carbide, Nitride and Sulfide Clusters and Nanocrystallites, J. M. Lightstone, H. Mann, M. Wu, P. M. Johnson, and M. G. White, J Phys. Chem, B 107, 10359 (2003). A Study of the Partial Oxidation of Methanol on a Polycrystalline Ag Membrane, R. J. Beuhler, R. M. Rao and M. G. White, J. Phys. Chem. 105, 5950 (2000). Acetone n-Radical Cation Internal Roration Spectrum: The Torsional Potential Surface, D. A. Shea, L. Goodman and M. G. White, J. Chem. Phys., 112, 2762 (2000) State-Selective Laser Photochemistry of Formaldehyde on Ag(111), R. M. Rao, J. Dvorak, R. J. Beuhler and M. G. White, J. Phys. Chem. B, 102, 9050 (1998) Non-Thermal Photodesorption of N2 from Ag(111), R. M. Rao, R. J. Beuhler and M. G. White, J. Chem. Phys., 109, 8016 (1998) Two-Color ZEKE-PFI Spectroscopy of the Acetone n-Radical Cation: the a2 Torsional Vibration, R. T. Wiedmann, L. Goodman and M. G. White, Chem. Phys. Lett. 293, 391 (1998) State-Resolved Photodesorption of CO From Ag (111): Non-Thermal Desorption at 1064 nm, L. E. Fleck, R. J. Beuhler and M. G. White, J. Chem. Phys. 106, 3813 (1997) State-Resolved Photoionization of Small Molecules, M. G. White, In Frontiers of Chemical Dynamics, E. Yurtsever, Editor, (Kluwer Academic Publishers, Amsterdam, 1995) p. 43.