Catalysis with Supported Size-selected Pt Clusters: by Florian Frank Schweinberger

By Florian Frank Schweinberger

In his thesis, Florian Schweinberger investigates the impression of the perfect dimension of catalytically energetic species on reactivity. to be able to do that he contains out experiences either in UHV and less than ambient stipulations for supported, size-selected Platium clusters (8-68 atoms). Schweinberger probed the digital constitution, adsorption homes and reactivity of 2 olefins on surfaces and Pt clusters within the submonolayer variety. With adsorbed trichloroethene (TCE) a potential cluster-adsorbate precipitated switch within the digital constitution, and for ethene a low-temperature, size-dependent self-/hydrogenation used to be observed.In a collaborative method, Schweinberger and associates investigated Pt clusters less than ambient strain stipulations. They characterized the clusters at on the neighborhood and imperative point and demonstrated for temperature balance. Experiments in gasoline part ?-reactors and in liquid, as a part of a hybrid photocatalytic procedure, printed size-dependent reactivity.Overall this thesis isn't just of curiosity in the event you are looking to practice comparable experiments but additionally presents really good clinical insights for researchers within the field.

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By Florian Frank Schweinberger

In his thesis, Florian Schweinberger investigates the impression of the perfect dimension of catalytically energetic species on reactivity. to be able to do that he contains out experiences either in UHV and less than ambient stipulations for supported, size-selected Platium clusters (8-68 atoms). Schweinberger probed the digital constitution, adsorption homes and reactivity of 2 olefins on surfaces and Pt clusters within the submonolayer variety. With adsorbed trichloroethene (TCE) a potential cluster-adsorbate precipitated switch within the digital constitution, and for ethene a low-temperature, size-dependent self-/hydrogenation used to be observed.In a collaborative method, Schweinberger and associates investigated Pt clusters less than ambient strain stipulations. They characterized the clusters at on the neighborhood and imperative point and demonstrated for temperature balance. Experiments in gasoline part ?-reactors and in liquid, as a part of a hybrid photocatalytic procedure, printed size-dependent reactivity.Overall this thesis isn't just of curiosity in the event you are looking to practice comparable experiments but additionally presents really good clinical insights for researchers within the field.

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Cortright, R. , Nørskov, J. , & Dumesic, J. A. (2000). Journal of Physical Chemistry B, 104, 2299. 60. , & Vlachos, D. G. (2010). Journal of Physical Chemistry C, 114, 4973. 61. , Butt, J. , & Kung, H. H. (1985). Langmuir, 1, 206. 62. , & Jupille, J. (1990). Vacuum, 41, 161. 63. Rioux, R. , Hoefelmeyer, J. , & Somorjai, G. A. (2004). Journal of Physical Chemistry B, 109, 2192. 64. Henry, C. R. (1998). Surface Science Reports, 31, 231. 65. , & Dufour, G. (1986). Surface Science, 173, 479. 66. Ko, M.

However, for particles supported on SiO2 and Al2 O3 with a size below 2 nm a structure sensitivity is observed. 6 nm, until no reactivity was measured [64, 65]. On a more mechanistic level it was mentioned that ethylidyne would not be involved in the reaction in the case of supported particles [49, 67] and that in absence of hydrogen only the di − σ species could be converted to ethylidyne [68]. 20 (a) 2 Literature Survey and Theory (b) Fig. 1 Reaction scheme and energy diagram for the surface chemistry occurring during thermal conversion of ethene via hydrogenation on Pt(111), (a).

Nørskov, J. K. (1995). Surface Science, 343, 211. 20. , & Nørskov, J. (1997). Journal of Molecular Catalysis A: Chemical, 115, 421. 21. , & Nørskov, J. (2000). Advances in catalysis, 45, 71. 22. -H. (2000). ). Berlin: Springer. 23. , & Anderson, S. (2009). Science, 326, 826. 24. , & Isomura, N. (2009). Journal of Vacuum Science & Technology A, 27, 1153. 25. Lundwall, M. , McClure, S. , & Goodman, D. W. (2010). Journal of Physical Chemistry C, 114, 7904. 26. Boudart, M. (2000). Topics in Catalysis, 13, 147.

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