About: Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface

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About: Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.vacuum.2011.07.021
Description	In the present paper we investigated the growth and electronic properties of Pt or Au clusters and formation of Pt-Au bimetallic clusters prepared %22in-situ%22 on tungsten oxide surface by physical deposition under vacuum. The epitaxial tungsten oxide thin films were prepared by oxidation of W(110) single-crystal surface using a RF oxygen plasma source followed by thermal annealing. The chemical state of the system, the interaction between deposit and substrate and formation of Pt-Al alloy were investigated by photoelectron spectroscopy excited by synchrotron radiation (SRPES) and K;alpha X-ray source (XPS). We found that in contrary to Au clusters the Pt ones strongly interacts with the substrate. Deposition of both Pt and Au on the surface at the substrate temperature of 300 degrees C gave rise to the formation of bimetallic core shell clusters. The detail structure of the bimetallic system depends on the order of deposited metals. These findings can explain some properties of Pt/WOx and Au/WOx as well as Pt-Au/WOx bimetallic catalysts and gas sensors. In the present paper we investigated the growth and electronic properties of Pt or Au clusters and formation of Pt-Au bimetallic clusters prepared %22in-situ%22 on tungsten oxide surface by physical deposition under vacuum. The epitaxial tungsten oxide thin films were prepared by oxidation of W(110) single-crystal surface using a RF oxygen plasma source followed by thermal annealing. The chemical state of the system, the interaction between deposit and substrate and formation of Pt-Al alloy were investigated by photoelectron spectroscopy excited by synchrotron radiation (SRPES) and K;alpha X-ray source (XPS). We found that in contrary to Au clusters the Pt ones strongly interacts with the substrate. Deposition of both Pt and Au on the surface at the substrate temperature of 300 degrees C gave rise to the formation of bimetallic core shell clusters. The detail structure of the bimetallic system depends on the order of deposited metals. These findings can explain some properties of Pt/WOx and Au/WOx as well as Pt-Au/WOx bimetallic catalysts and gas sensors. (en)
Title	Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface (en)
skos:prefLabel	Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface Structural and electronic studies of supported Pt and Au epitaxial clusters on tungsten oxide surface (en)
skos:notation	RIV/00216208:11320/12:10130579!RIV13-MSM-11320___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(LC06058), Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Píš, Igor Matolín, Vladimír Mašek, Karel Beran, Jan Blumentrit, Petr Polášek, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Matematicko-fyzikální fakulta
http://linked.open...dnocenehoVysledku	171795
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10130579
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Photoelectron spectroscopy; Alloy; Au; Pt; Tungsten oxide (en)
http://linked.open.../riv/klicoveSlovo	Photoelectron spectroscopy Au Pt Alloy Tungsten oxide
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[D6635529F0CD]
http://linked.open...i/riv/nazevZdroje	Vacuum
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of synchrotron radiation materials study
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	86
http://linked.open...iv/tvurceVysledku	Beran, Jan Matolín, Vladimír Mašek, Karel Píš, Igor Skala, T. Blumentrit, Petr Polášek, Jan
http://linked.open...ain/vavai/riv/wos	000301018400003
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	0042-207X
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.vacuum.2011.07.021
http://localhost/t...ganizacniJednotka	11320

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