About: Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering

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About: Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering 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.apsusc.2012.08.036
Description	Layers of different thickness of CeO2 doped by Pt were prepared by magnetron sputtering on different substrates: Si (1 0 0) and a graphite foil. The structure and chemical composition of the Pt-CeO2 catalysts have been investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and hard X-ray photoelectron spectroscopy (HAXPES). SEM showed that the layers prepared on different substrates had very different morphology. XPS and HAXPES studies demonstrated that Pt was dispersed only in Pt2+ and Pt4+ oxidation states in CeO2. Intensity of Pt2+- and Pt4+-peaks was affected by the plasma substrate interaction effects showing that carbon substrate played an active role by determining the film structure. The Pt2+/Pt4+ and Ce3+/Ce4+ ratios depend on the layer thickness and increases in the case of the graphite substrate. The reduced character of porous layer was explained by a general effect of formation of defects and oxygen vacancies at oxide edges and steps, and oxygen reaction with carbon which is responsible of formation of oxygen deficient cerium oxide at the interface. Layers of different thickness of CeO2 doped by Pt were prepared by magnetron sputtering on different substrates: Si (1 0 0) and a graphite foil. The structure and chemical composition of the Pt-CeO2 catalysts have been investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and hard X-ray photoelectron spectroscopy (HAXPES). SEM showed that the layers prepared on different substrates had very different morphology. XPS and HAXPES studies demonstrated that Pt was dispersed only in Pt2+ and Pt4+ oxidation states in CeO2. Intensity of Pt2+- and Pt4+-peaks was affected by the plasma substrate interaction effects showing that carbon substrate played an active role by determining the film structure. The Pt2+/Pt4+ and Ce3+/Ce4+ ratios depend on the layer thickness and increases in the case of the graphite substrate. The reduced character of porous layer was explained by a general effect of formation of defects and oxygen vacancies at oxide edges and steps, and oxygen reaction with carbon which is responsible of formation of oxygen deficient cerium oxide at the interface. (en)
Title	Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering (en)
skos:prefLabel	Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering Nanostructured Pt-CeO2 thin film catalyst grown on graphite foil by magnetron sputtering (en)
skos:notation	RIV/00216208:11320/13:10192086!RIV14-GA0-11320___
http://linked.open...avai/predkladatel	Matematicko-fyzikální fakulta
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP204/10/1169), P(GD202/09/H041)
http://linked.open...iv/cisloPeriodika	únor
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Matolínová, Iva Matolín, Vladimír Khalakhan, Ivan Vorokhta, Mykhailo
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	90622
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/13:10192086
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HAXPES; Photoelectron spectroscopy; Nanoporous; Magnetron sputtering; Graphite foil; Cerium oxide (en)
http://linked.open.../riv/klicoveSlovo	Graphite foil HAXPES Nanoporous Cerium oxide Photoelectron spectroscopy Magnetron sputtering
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[AE17316AB3FD]
http://linked.open...i/riv/nazevZdroje	Applied Surface Science
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Physics of nanostructures New catalyst for hydrogen polymer membrane fuel cell: CNT coated by Pt-CeO2 thin films
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	267
http://linked.open...iv/tvurceVysledku	Matolín, Vladimír Matolínová, Iva Vorokhta, Mykhailo Khalakhan, Ivan Kobayashi, Keisuke Kobata, Masaaki Yoshikawa, Hideki
http://linked.open...ain/vavai/riv/wos	000314881900029
issn	0169-4332
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.apsusc.2012.08.036
http://localhost/t...ganizacniJednotka	11320

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