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Chemistry - Catalysis | Catalysis with Supported Size-selected Pt Clusters - Fundamental UHV and Applied Ambient Experiments

Catalysis with Supported Size-selected Pt Clusters

Fundamental UHV and Applied Ambient Experiments

Series: Springer Theses

Schweinberger, Florian Frank

2014, XXI, 222 p. 136 illus., 91 illus. in color.

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  • Nominated as an outstanding Ph.D. thesis by the Technische Universität München, Germany
  • Shows new size-dependent reactions under UHV conditions on clusters and compares them to single-crystal data in the same setup
  • Presents various new means of characterization and applications for clusters as heterogeneous model catalysis under applied, ambient conditions
  • Includes results on size- and coverage-dependent catalytic reactions under ambient conditions, including measurements in ?-reactors and as part of a hybrid photocatalytic material
In his thesis, Florian Schweinberger investigates the influence of the precise size of catalytically active species on reactivity. In order to do this he carries out studies both in UHV and under ambient conditions for supported, size-selected Platium clusters (8-68 atoms). Schweinberger probed the electronic structure, adsorption properties and reactivity of two olefins on surfaces and Pt clusters in the submonolayer range. With adsorbed trichloroethene (TCE) a possible cluster-adsorbate induced change in the electronic structure, and for ethene a low-temperature, size-dependent self-/hydrogenation was observed.In a collaborative approach, Schweinberger and colleagues investigated Pt clusters under ambient pressure conditions. They characterised the clusters at at the local and integral level and tested for temperature stability. Experiments in gas phase ?-reactors and in liquid, as part of a hybrid photocatalytic system, revealed size-dependent reactivity.Overall this thesis is not only of interest for those who want to perform similar experiments but also provides superb scientific insights for researchers in the field.

Content Level » Research

Keywords » Applied Ambient Model Catalyst Experiments - CO Oxidation - Ethylene Hydrogenation - Laser Evaporation Cluster Source - Model Catalyst Characterization - Photocatalytic Water Splitting - Platinum Cluster Chemistry - Sensitive Photoelectron Emission Spectroscopy - Sophisticated and Absolute Surface - Stability and Reactivity

Related subjects » Catalysis - Physical Chemistry - Renewable and Green Energy

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