This HTML5 document contains 66 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

Namespace Prefixes

PrefixIRI
dctermshttp://purl.org/dc/terms/
n18http://localhost/temp/predkladatel/
n11http://linked.opendata.cz/resource/domain/vavai/projekt/
n5http://linked.opendata.cz/resource/domain/vavai/riv/tvurce/
n14http://linked.opendata.cz/ontology/domain/vavai/
shttp://schema.org/
skoshttp://www.w3.org/2004/02/skos/core#
rdfshttp://www.w3.org/2000/01/rdf-schema#
n3http://linked.opendata.cz/ontology/domain/vavai/riv/
n10http://bibframe.org/vocab/
n20http://linked.opendata.cz/resource/domain/vavai/vysledek/RIV%2F61989592%3A15310%2F14%3A33151761%21RIV15-MSM-15310___/
n2http://linked.opendata.cz/resource/domain/vavai/vysledek/
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n4http://linked.opendata.cz/ontology/domain/vavai/riv/klicoveSlovo/
n19http://linked.opendata.cz/ontology/domain/vavai/riv/duvernostUdaju/
xsdhhttp://www.w3.org/2001/XMLSchema#
n15http://linked.opendata.cz/ontology/domain/vavai/riv/jazykVysledku/
n7http://linked.opendata.cz/ontology/domain/vavai/riv/aktivita/
n9http://linked.opendata.cz/ontology/domain/vavai/riv/druhVysledku/
n8http://linked.opendata.cz/ontology/domain/vavai/riv/obor/
n13http://reference.data.gov.uk/id/gregorian-year/

Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F14%3A33151761%21RIV15-MSM-15310___
rdf:type
n14:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0008622314002528
dcterms:description
Variations in the adsorption enthalpies of acetone to few-layer graphene and graphite nanopowders were analyzed as a function of surface coverage. The adsorption enthalpies were measured by inverse gas chromatography at low monolayer coverage levels (0.1-20%). The adsorption enthalpies increased from -13 kca/mol at the lowest coverage to -7.5 kca/mol. We fitted the measured adsorption enthalpies as a function of coverage using a two-state model and estimated the number of high-energy sites on both materials. The graphite powder had seven times more high-energy sites than the few-layer graphene, which explains why the adsorption enthalpies for graphite increased more slowly with increasing coverage. We also performed a theoretical study based on density functional theory calculations using a functional that accounts for dispersive interactions to elucidate the nature of the high-energy adsorption sites. The calculated adsorption enthalpies ranged from -16 to -1 kca/mol while the adsorpTion enthalpy to a plain graphite surface was -9 kca/mol. The high-energy adsorption sites were localized on surface steps and edge-cavities. The adsorption enthalpies at very low coverage therefore corresponded to adsorption on steps and edge cavities, while those measured at coverage levels of similar to 4% or more reflected adsorption to the flat surface. (c) 2014 Elsevier Ltd. All rights reserved. Variations in the adsorption enthalpies of acetone to few-layer graphene and graphite nanopowders were analyzed as a function of surface coverage. The adsorption enthalpies were measured by inverse gas chromatography at low monolayer coverage levels (0.1-20%). The adsorption enthalpies increased from -13 kca/mol at the lowest coverage to -7.5 kca/mol. We fitted the measured adsorption enthalpies as a function of coverage using a two-state model and estimated the number of high-energy sites on both materials. The graphite powder had seven times more high-energy sites than the few-layer graphene, which explains why the adsorption enthalpies for graphite increased more slowly with increasing coverage. We also performed a theoretical study based on density functional theory calculations using a functional that accounts for dispersive interactions to elucidate the nature of the high-energy adsorption sites. The calculated adsorption enthalpies ranged from -16 to -1 kca/mol while the adsorpTion enthalpy to a plain graphite surface was -9 kca/mol. The high-energy adsorption sites were localized on surface steps and edge-cavities. The adsorption enthalpies at very low coverage therefore corresponded to adsorption on steps and edge cavities, while those measured at coverage levels of similar to 4% or more reflected adsorption to the flat surface. (c) 2014 Elsevier Ltd. All rights reserved.
dcterms:title
The nature of high surface energy sites in graphene and graphite The nature of high surface energy sites in graphene and graphite
skos:prefLabel
The nature of high surface energy sites in graphene and graphite The nature of high surface energy sites in graphene and graphite
skos:notation
RIV/61989592:15310/14:33151761!RIV15-MSM-15310___
n3:aktivita
n7:S n7:P
n3:aktivity
P(ED2.1.00/03.0058), P(EE2.3.20.0017), P(GBP208/12/G016), S
n3:cisloPeriodika
JUL
n3:dodaniDat
n13:2015
n3:domaciTvurceVysledku
n5:1878220 n5:1836595 n5:7266065 n5:5625076 n5:3151948 n5:8682291 n5:7008686 n5:5994047 n5:9251189
n3:druhVysledku
n9:J
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
31739
n3:idVysledku
RIV/61989592:15310/14:33151761
n3:jazykVysledku
n15:eng
n3:klicovaSlova
molecules; derivatives; heterogenity; adsorption; desorption; carbon; noncovalent interactions; augmented-wave method; density-functional theory; inverse gas-chromatography
n3:klicoveSlovo
n4:adsorption n4:noncovalent%20interactions n4:desorption n4:derivatives n4:heterogenity n4:carbon n4:augmented-wave%20method n4:molecules n4:inverse%20gas-chromatography n4:density-functional%20theory
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[1C34DC8EBF82]
n3:nazevZdroje
Carbon
n3:obor
n8:CF
n3:pocetDomacichTvurcuVysledku
9
n3:pocetTvurcuVysledku
9
n3:projekt
n11:GBP208%2F12%2FG016 n11:ED2.1.00%2F03.0058 n11:EE2.3.20.0017
n3:rokUplatneniVysledku
n13:2014
n3:svazekPeriodika
73
n3:tvurceVysledku
Pechoušek, Jiří Banáš, Pavel Zbořil, Radek Lapčík, Lubomír Lazar, Petr Otyepková, Eva Fargašová, Ariana Čépe, Klára Otyepka, Michal
n3:wos
000335096300049
s:issn
0008-6223
s:numberOfPages
5
n10:doi
10.1016/j.carbon.2014.03.010
n18:organizacniJednotka
15310