About: Maximum Noble-Metal Efficiency in Catalytic Materials: Atomically Dispersed Surface Platinum

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://dx.doi.org/10.1002/anie.201402342
Description	Platinum is the most versatile element in catalysis, but it is rare and its high price limits large-scale applications, for example in fuel-cell technology. Still, conventional catalysts use only a small fraction of the Pt content, that is, those atoms located at the catalyst's surface. To maximize the noble-metal efficiency, the precious metal should be atomically dispersed and exclusively located within the outermost surface layer of the material. Such atomically dispersed Pt surface species can indeed be prepared with exceptionally high stability. Using DFT calculations we identify a specific structural element, a ceria %22nanopocket%22, which binds Pt2+ so strongly that it withstands sintering and bulk diffusion. On model catalysts we experimentally confirm the theoretically predicted stability, and on real Pt-CeO2 nanocomposites showing high Pt efficiency in fuel-cell catalysis we also identify these anchoring sites. Platinum is the most versatile element in catalysis, but it is rare and its high price limits large-scale applications, for example in fuel-cell technology. Still, conventional catalysts use only a small fraction of the Pt content, that is, those atoms located at the catalyst's surface. To maximize the noble-metal efficiency, the precious metal should be atomically dispersed and exclusively located within the outermost surface layer of the material. Such atomically dispersed Pt surface species can indeed be prepared with exceptionally high stability. Using DFT calculations we identify a specific structural element, a ceria %22nanopocket%22, which binds Pt2+ so strongly that it withstands sintering and bulk diffusion. On model catalysts we experimentally confirm the theoretically predicted stability, and on real Pt-CeO2 nanocomposites showing high Pt efficiency in fuel-cell catalysis we also identify these anchoring sites. (en)
Title	Maximum Noble-Metal Efficiency in Catalytic Materials: Atomically Dispersed Surface Platinum Maximum Noble-Metal Efficiency in Catalytic Materials: Atomically Dispersed Surface Platinum (en)
skos:prefLabel	Maximum Noble-Metal Efficiency in Catalytic Materials: Atomically Dispersed Surface Platinum Maximum Noble-Metal Efficiency in Catalytic Materials: Atomically Dispersed Surface Platinum (en)
skos:notation	RIV/00216208:11320/14:10289673!RIV15-MSM-11320___
http://linked.open...avai/riv/aktivita	I P S
http://linked.open...avai/riv/aktivity	I, P(GA13-10396S), P(GAP204/11/1183), P(LG12003), S
http://linked.open...iv/cisloPeriodika	39
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Ševčíková, Klára Mysliveček, Josef Tsud, Nataliya Matolínová, Iva Matolín, Vladimír Skála, Tomáš Václavů, Michal Fiala, Roman Vorokhta, Mykhailo Stetsovych, Vitalii
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	27713
http://linked.open...ai/riv/idVysledku	RIV/00216208:11320/14:10289673
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	platinum; model catalyst; heterogeneous catalysis; density functional calculations; ceria nanoparticles (en)
http://linked.open.../riv/klicoveSlovo	model catalyst heterogeneous catalysis platinum density functional calculations ceria nanoparticles
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[4F7CC74D4091]
http://linked.open...i/riv/nazevZdroje	Angewandte Chemie - International Edition
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	10 (xsd:int)
http://linked.open...cetTvurcuVysledku	19 (xsd:int)
http://linked.open...vavai/riv/projekt	Materials science beamline at synchrotron Elettra in Trieste New materials for planar fuel cells Metal atoms on model surfaces of ceria
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	53
http://linked.open...iv/tvurceVysledku	Matolín, Vladimír Matolínová, Iva Mysliveček, Josef Skála, Tomáš Tsud, Nataliya Vorokhta, Mykhailo Fiala, Roman Prince, Kevin C. Libuda, Joerg Lykhach, Yaroslava Václavů, Michal Neyman, Konstantin M. Stetsovych, Vitalii Bruyere, Stephanie Potin, Valerie Ševčíková, Klára Neitzel, Armin Bruix, Albert Illas, Francesc
http://linked.open...ain/vavai/riv/wos	000342760700047
issn	1433-7851
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/anie.201402342
http://localhost/t...ganizacniJednotka	11320

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