Download e-book for kindle: Catalysis with Supported Size-selected Pt Clusters: by Florian Frank Schweinberger

By Florian Frank Schweinberger

ISBN-10: 3319014986

ISBN-13: 9783319014982

ISBN-10: 3319014994

ISBN-13: 9783319014999

In his thesis, Florian Schweinberger investigates the effect of the proper measurement of catalytically lively species on reactivity. that allows you to do that he contains out reviews either in UHV and lower 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 brought on switch within the digital constitution, and for ethene a low-temperature, size-dependent self-/hydrogenation used to be observed.In a collaborative strategy, Schweinberger and co-workers investigated Pt clusters lower than ambient strain stipulations. They characterized the clusters at on the neighborhood and crucial point and validated for temperature balance. Experiments in gasoline part ?-reactors and in liquid, as a part of a hybrid photocatalytic process, printed size-dependent reactivity.Overall this thesis isn't just of curiosity when you are looking to practice related experiments but in addition presents fantastic medical insights for researchers within the field.

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For example, measurements found that only 10 % of a saturated ethene layer were converted via self-hydrogenation to ethane at 283 K [54]. Based on these considerations and experimental evidences a current model for the ethane formation on Pt(111) is depicted in Fig. 1a, involving both π -bonded and di − σ bonded species [49]. The competitive interplay between ethylidyne formation and the hydrogenation to form ethane [49] is presented as both a reaction scheme and as an energy diagram. Possible routes to the formation of ethylidyne are shown in Fig.

Hole-state energies (BE) are lowered ( ERV ) upon physisorption, because of screening by the substrates (note the bigger relaxation for core holes ERC ). 3 Model Catalysts Under Ambient and Applied Conditions In this section the motivation and common approaches for the study of model catalyst materials under ambient conditions is further elucidated. Additionally, in the context of the performed experiments, a short introduction into the stability of supported catalysts is given. 1 Materials and Pressure Gap The understanding of surface reactions in general, with respect to catalytic reactions, was predominantly achieved using surface science [64, 86, 129].

Isomura, N. (2011). Catalysis Science & Technology, 1, 1490. 32. Jensen, R. (2012). D. thesis, Danmarks Tekniske Universitet. 33. Ertl, G. (2007). In Noble lectures chemistry; Noble Foundation. 34. , & Somorjai, G. A. (1986). Surface Science, 167, 150. 35. Somorjai, G. (1994). Introduction to surface chemistry and catalysis (Vol. 2). New York: Wiley-Interscience. 36. Zaera, F. (1996). Langmuir, 12, 88. 37. , & Somorjai, G. A. (1984). Journal of the American Chemical Society, 106, 2288. 38. King, D.

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Catalysis with Supported Size-selected Pt Clusters: Fundamental UHV and Applied Ambient Experiments by Florian Frank Schweinberger


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