1 Ocak 2011 Dergi makalesi Açık Erişim

Emmez, Emre; Vovk, Evgeny I.; Bukhtiyarov, Valerii I.; Ozensoy, Emrah

DataCite XML

<?xml version='1.0' encoding='utf-8'?>
<resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://datacite.org/schema/kernel-4" xsi:schemaLocation="http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4.1/metadata.xsd">
  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/21001</identifier>
  <creators>
    <creator>
      <creatorName>Emmez, Emre</creatorName>
      <givenName>Emre</givenName>
      <familyName>Emmez</familyName>
      <affiliation>Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey</affiliation>
    </creator>
    <creator>
      <creatorName>Vovk, Evgeny I.</creatorName>
      <givenName>Evgeny I.</givenName>
      <familyName>Vovk</familyName>
    </creator>
    <creator>
      <creatorName>Bukhtiyarov, Valerii I.</creatorName>
      <givenName>Valerii I.</givenName>
      <familyName>Bukhtiyarov</familyName>
      <affiliation>Boreskov Inst Catalysis, Novosibirsk 630090, Russia</affiliation>
    </creator>
    <creator>
      <creatorName>Ozensoy, Emrah</creatorName>
      <givenName>Emrah</givenName>
      <familyName>Ozensoy</familyName>
      <affiliation>Bilkent Univ, Dept Chem, TR-06800 Ankara, Turkey</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Direct Evidence For The Instability And Deactivation Of Mixed-Oxide Systems: Influence Of Surface Segregation And Subsurface Diffusion</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2011</publicationYear>
  <dates>
    <date dateType="Issued">2011-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/21001</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1021/jp206969h</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">In the current contribution, we provide a direct demonstration of the thermally induced surface structural transformations of an alkaline-earth oxide/transition metal oxide interface that is detrimental to the essential catalytic functionality of such mixed-oxide systems toward particular reactants. The BaO(x)/TiO(2)/Pt(111) surface was chosen as a model interfacial system where the enrichment of the surface elemental composition with Ti atoms and the facile diffusion of Ba atoms into the underlying TiO(2) matrix within 523-873 K leads to the formation of perovskite type surface species (BaTiO(3)/Ba(2)TiO(4)/Ba(x)Ti(y)O(z)). At elevated temperatures (T &amp;gt; 973 K), excessive surface segregation of Ti atoms results in an exclusively TiO(2)/TiO(x)-terminated surface which is almost free of Ba species. Although the freshly prepared BaO(x)/TiO(2)/Pt(111) surface can strongly adsorb ubiquitous catalytic adsorbates such as NO(2) and CO(2), a thermally deactivated surface at T &amp;gt; 973 K practically loses all of its NO(2)/CO(2) adsorption capacity due to the deficiency of surface BaO(x) domains.</description>
  </descriptions>
</resource>