<div class="csl-bib-body">
<div class="csl-entry">García, C., Pollitt, S., van der Linden, M., Truttmann, V., Rameshan, C., Rameshan, R., Pittenauer, E., Allmaier, G., Kregsamer, P., Stöger-Pollach, M., Barrabés, N., & Rupprechter, G. (2019). Support effect on the reactivity and stability of Au₂₅(SR)₁₈ and Au₁₄₄(SR)₆₀ nanoclusters in liquid phase cyclohexane oxidation. <i>Catalysis Today</i>, <i>336</i>, 174–185. https://doi.org/10.1016/j.cattod.2018.12.013</div>
</div>
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dc.identifier.issn
0920-5861
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/142322
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dc.description.abstract
Using oxide supported atomically precise gold nanoclusters is an emerging field in heterogeneous catalysis. Such well-defined nanocatalysts represent a rather new model system enabling fundamental insights in catalytic reactions. In the present work, the stability of Au₂₅ and Au144 clusters, supported either on TiO₂ or SiO₂, was examined upon thermal air pretreatment and, for the first time, upon liquid phase oxidation reaction. A pronounced influence of the support (TiO₂ vs. SiO₂) and cluster size (Au₂₅ vs. Au₁₄₄) was revealed by XAS, DRS and STEM. Upon pretreatment, Au₁₄₄ was more stable which may be related to its specific cluster core structure and staple configuration. The catalytic properties in liquid phase cyclohexane oxidation were clearly size dependent, with Au144 yielding higher TOF values, particularly in the case of SiO₂ supported catalysts. However, with respect to selectivity, TiO₂ supported catalysts led to higher KA production than SiO₂ supported ones. This can be explained by the different reaction pathways, as observed by in situ ATR. HERFD-XAS measurements of Au₁₄₄/TiO₂ catalysts revealed a pronounced cluster structure modification towards bulk gold during the reaction, in contrast to a high stability of Au₁₄₄/SiO₂. This study demonstrates the important role the support material has on the reactivity and stability of gold nanoclusters, which is key for their catalytic function.
en
dc.publisher
ELSEVIER
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dc.relation.ispartof
Catalysis Today
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dc.subject
General Chemistry
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dc.subject
Catalysis
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dc.subject
Gold nanoclusters
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dc.subject
Support effect
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dc.subject
Structure stability
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dc.subject
Catalytic oxidation of cyclohexane
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dc.subject
Operando ATR spectroscopy
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dc.subject
HERFD-XAS
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dc.title
Support effect on the reactivity and stability of Au₂₅(SR)₁₈ and Au₁₄₄(SR)₆₀ nanoclusters in liquid phase cyclohexane oxidation
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dc.type
Artikel
de
dc.type
Article
en
dc.description.startpage
174
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dc.description.endpage
185
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dc.type.category
Original Research Article
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tuw.container.volume
336
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tuw.journal.peerreviewed
true
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tuw.peerreviewed
true
-
wb.publication.intCoWork
International Co-publication
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tuw.researchTopic.id
M7
-
tuw.researchTopic.id
M2
-
tuw.researchTopic.id
M1
-
tuw.researchTopic.name
Special and Engineering Materials
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tuw.researchTopic.name
Materials Characterization
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tuw.researchTopic.name
Surfaces and Interfaces
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tuw.researchTopic.value
25
-
tuw.researchTopic.value
25
-
tuw.researchTopic.value
50
-
dcterms.isPartOf.title
Catalysis Today
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tuw.publication.orgunit
E141-05 - Forschungsbereich Radiation Physics
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tuw.publication.orgunit
E057-02 - Fachbereich Universitäre Serviceeinrichtung für Transmissions- Elektronenmikroskopie
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tuw.publication.orgunit
E165-01 - Forschungsbereich Physikalische Chemie
-
tuw.publication.orgunit
E164-01-1 - Forschungsgruppe Massenspektrometrische Bio- und Polymeranalytik
-
tuw.publication.orgunit
E165-01-3 - Forschungsgruppe Elektrokatalyse an Oberflächen
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tuw.publisher.doi
10.1016/j.cattod.2018.12.013
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dc.identifier.eissn
1873-4308
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dc.description.numberOfPages
12
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tuw.author.orcid
0000-0002-1438-9462
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wb.sci
true
-
wb.sciencebranch
Chemie
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1040
-
wb.sciencebranch.oefos
1030
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wb.facultyfocus
Chemistry and Technology of Materials
de
wb.facultyfocus
Chemistry and Technology of Materials
en
wb.facultyfocus.faculty
E150
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item.fulltext
no Fulltext
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item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
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item.cerifentitytype
Publications
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item.openairetype
research article
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item.grantfulltext
none
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crisitem.author.dept
E165-01-1 - Forschungsgruppe Modellkatalyse und angewandte Katalyse
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crisitem.author.dept
E165-01-1 - Forschungsgruppe Modellkatalyse und angewandte Katalyse
-
crisitem.author.dept
E165-01-1 - Forschungsgruppe Modellkatalyse und angewandte Katalyse