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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10192065%21RIV14-MSM-11320___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.apsusc.2013.06.047
dcterms:description
In this paper, we investigated formation and structure of gold, platinum and Pt-Au bimetallic clusters on tungsten oxide surface. Crystallographic structure and orientation were investigated by reflection high energy electron diffraction, chemical composition and cluster's electronic state by synchrotron radiation photoelectron spectroscopy. Small amount of Au and Pt was deposited on WO3 (1 1 1) surface prepared by RF plasma oxidation and thermal annealing of (1 1 0) tungsten single crystal surface. Formation of 3D Pt or Au clusters with (1 1 1) epitaxial plane was observed. On the contrary to Au, strong metal substrate interaction between Pt and oxide was found, leading to the encapsulation of Pt clusters. Formation of Au-Pt bimetallic clusters was investigated at the temperature range of 160-870 K. It was found that cluster structure depends on the substrate temperature and order of materials deposition. At the temperatures around 570 K, metals formed bimetallic clusters with core-shell structure. Annealing to the temperatures over 770 K led to the decomposition of Pt-Au clusters and formation of Pt-W alloy. In this paper, we investigated formation and structure of gold, platinum and Pt-Au bimetallic clusters on tungsten oxide surface. Crystallographic structure and orientation were investigated by reflection high energy electron diffraction, chemical composition and cluster's electronic state by synchrotron radiation photoelectron spectroscopy. Small amount of Au and Pt was deposited on WO3 (1 1 1) surface prepared by RF plasma oxidation and thermal annealing of (1 1 0) tungsten single crystal surface. Formation of 3D Pt or Au clusters with (1 1 1) epitaxial plane was observed. On the contrary to Au, strong metal substrate interaction between Pt and oxide was found, leading to the encapsulation of Pt clusters. Formation of Au-Pt bimetallic clusters was investigated at the temperature range of 160-870 K. It was found that cluster structure depends on the substrate temperature and order of materials deposition. At the temperatures around 570 K, metals formed bimetallic clusters with core-shell structure. Annealing to the temperatures over 770 K led to the decomposition of Pt-Au clusters and formation of Pt-W alloy.
dcterms:title
Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters
skos:prefLabel
Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters Photoemission and RHEED study of the supported Pt and Au epitaxial alloy clusters
skos:notation
RIV/00216208:11320/13:10192065!RIV14-MSM-11320___
n16:predkladatel
n17:orjk%3A11320
n3:aktivita
n9:I n9:P
n3:aktivity
I, P(LD11047), P(LG12003)
n3:cisloPeriodika
říjen
n3:dodaniDat
n14:2014
n3:domaciTvurceVysledku
n4:2563592 n4:9461922 Vorokhta, Mykhailo n4:8636303 n4:1806440 n4:2023709 n4:9570500
n3:druhVysledku
n5:J
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
96095
n3:idVysledku
RIV/00216208:11320/13:10192065
n3:jazykVysledku
n13:eng
n3:klicovaSlova
Photoelectron spectroscopy; Electron diffraction; Epitaxy; Tungsten oxide; Au; Pt
n3:klicoveSlovo
n8:Tungsten%20oxide n8:Electron%20diffraction n8:Au n8:Epitaxy n8:Photoelectron%20spectroscopy n8:Pt
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[FA94EC8602CB]
n3:nazevZdroje
Applied Surface Science
n3:obor
n20:BM
n3:pocetDomacichTvurcuVysledku
7
n3:pocetTvurcuVysledku
7
n3:projekt
n10:LD11047 n10:LG12003
n3:rokUplatneniVysledku
n14:2013
n3:svazekPeriodika
282
n3:tvurceVysledku
Tsud, Nataliya Mašek, Karel Vorokhta, Mykhailo Polášek, Jan Blumentrit, Petr Matolín, Vladimír Beran, Jan
n3:wos
000322314800113
s:issn
0169-4332
s:numberOfPages
11
n6:doi
10.1016/j.apsusc.2013.06.047
n18:organizacniJednotka
11320