About: Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1016/j.jallcom.2012.07.122
Description	V-Rh(111) bimetallic systems were prepared by deposition of 0.4 and 2.5 ML of vanadium on Rh(111) surface at 823 K and by annealing up to 1023 K. Subsurface alloys of similar composition and electronic structure were formed. On the latter one, (2 x 2) surface reconstruction was observed. Electronic structure of the V-Rh(111) subsurface alloys was studied by photoelectron spectroscopy utilizing synchrotron radiation. Atomic structure was studied by means of LEED and X-ray photoelectron diffraction. Chemisorption properties were probed by CO and O-2 adsorption. The topmost atomic layer with (2 x 2) reconstruction consisted exclusively of Rh atoms. The obtained results indicate formation of alloy with Rh3V composition and L1(2)-type structure. Changes observed in the electronic structure were correlated with lower reactivity towards CO adsorption. The photoemission data indicate that the CO saturation coverage at 300 K is reduced to less than half on the alloy surface as compared to clean Rh(111). Oxygen adsorbed on the alloy surface strongly interacted with the subsurface vanadium and induced formation of a surface vanadium oxide. (C) 2012 Elsevier B.V. All rights reserved. V-Rh(111) bimetallic systems were prepared by deposition of 0.4 and 2.5 ML of vanadium on Rh(111) surface at 823 K and by annealing up to 1023 K. Subsurface alloys of similar composition and electronic structure were formed. On the latter one, (2 x 2) surface reconstruction was observed. Electronic structure of the V-Rh(111) subsurface alloys was studied by photoelectron spectroscopy utilizing synchrotron radiation. Atomic structure was studied by means of LEED and X-ray photoelectron diffraction. Chemisorption properties were probed by CO and O-2 adsorption. The topmost atomic layer with (2 x 2) reconstruction consisted exclusively of Rh atoms. The obtained results indicate formation of alloy with Rh3V composition and L1(2)-type structure. Changes observed in the electronic structure were correlated with lower reactivity towards CO adsorption. The photoemission data indicate that the CO saturation coverage at 300 K is reduced to less than half on the alloy surface as compared to clean Rh(111). Oxygen adsorbed on the alloy surface strongly interacted with the subsurface vanadium and induced formation of a surface vanadium oxide. (C) 2012 Elsevier B.V. All rights reserved. (en)
Title	Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy (en)
skos:prefLabel	Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy (en)
skos:notation	RIV/00216208:11320/12:10130904!RIV13-GA0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GD202/09/H041), P(LA08022), P(LD11047), P(LG12003), S, Z(MSM0021620834)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Píš, Igor Šutara, František Cabala, Miloš Škoda, Michal Matolín, Vladimír Nehasil, Václav Skála, Tomáš Libra, Jiří
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	171821
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/12:10130904
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Synchrotron radiation; Photoelectron spectroscopies; Electronic band structure; Vapor deposition; Surfaces and interfaces; Transition metal alloys and compounds (en)
http://linked.open.../riv/klicoveSlovo	Vapor deposition Electronic band structure Photoelectron spectroscopies Surfaces and interfaces Synchrotron radiation Transition metal alloys and compounds
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[189FC6730235]
http://linked.open...i/riv/nazevZdroje	Journal of Alloys and Compounds
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	8 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Materials science beamline at synchrotron Elettra in Trieste Participation of Czech scientists in synchrotron radiation experiments at Elettra Physics of nanostructures Model Systems of Nanostructured Bimetallic Materials for Enviromental Applications
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	543
http://linked.open...iv/tvurceVysledku	Matolín, Vladimír Píš, Igor Skála, Tomáš Škoda, Michal Cabala, Miloš Šutara, František Nehasil, Václav Libra, Jiří
http://linked.open...ain/vavai/riv/wos	000311195000033
http://linked.open...n/vavai/riv/zamer	Condensed Matter Physics – New Materials and Technologies
issn	0925-8388
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.jallcom.2012.07.122
http://localhost/t...ganizacniJednotka	11320
is http://linked.open...avai/riv/vysledek of	Structural, electronic and adsorption properties of V-Rh(111) subsurface alloy

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