KOPS - Das Institutionelle Repositorium der Universität Konstanz

Cu/ZnO aggregates in siliceous mesoporous matrices : development of a new model methanol synthesis catalyst

Cu/ZnO aggregates in siliceous mesoporous matrices : development of a new model methanol synthesis catalyst

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:9ae9dbc70e1bba40f0605dc4766006c5

BERG, Maurits W. E. van den, Sebastian POLARZ, Olga P. TKACHENKO, Konstantin V. KLEMENTIEV, Mahuya BANDYOPADHYAY, Lamma KHODEIR, Hermann GIES, Martin MUHLER, Wolfgang GRÜNERT, 2006. Cu/ZnO aggregates in siliceous mesoporous matrices : development of a new model methanol synthesis catalyst. In: Journal of Catalysis. 241(2), pp. 446-455. ISSN 0021-9517. Available under: doi: 10.1016/j.jcat.2006.05.020

@article{Berg2006CuZnO-9613, title={Cu/ZnO aggregates in siliceous mesoporous matrices : development of a new model methanol synthesis catalyst}, year={2006}, doi={10.1016/j.jcat.2006.05.020}, number={2}, volume={241}, issn={0021-9517}, journal={Journal of Catalysis}, pages={446--455}, author={Berg, Maurits W. E. van den and Polarz, Sebastian and Tkachenko, Olga P. and Klementiev, Konstantin V. and Bandyopadhyay, Mahuya and Khodeir, Lamma and Gies, Hermann and Muhler, Martin and Grünert, Wolfgang} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/9613"> <dc:creator>Muhler, Martin</dc:creator> <dc:contributor>Polarz, Sebastian</dc:contributor> <dc:contributor>Bandyopadhyay, Mahuya</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:13:10Z</dcterms:available> <dc:creator>Khodeir, Lamma</dc:creator> <dc:format>application/pdf</dc:format> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9613/1/Cu_ZnO_aggregates_in_siliceous_mesoporous_matrices.pdf"/> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dc:creator>Gies, Hermann</dc:creator> <dc:creator>Grünert, Wolfgang</dc:creator> <dc:contributor>Gies, Hermann</dc:contributor> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9613"/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Bandyopadhyay, Mahuya</dc:creator> <dc:creator>Klementiev, Konstantin V.</dc:creator> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9613/1/Cu_ZnO_aggregates_in_siliceous_mesoporous_matrices.pdf"/> <dc:creator>Berg, Maurits W. E. van den</dc:creator> <dc:contributor>Muhler, Martin</dc:contributor> <dc:language>eng</dc:language> <dc:contributor>Grünert, Wolfgang</dc:contributor> <dc:contributor>Berg, Maurits W. E. van den</dc:contributor> <dc:rights>deposit-license</dc:rights> <dc:creator>Polarz, Sebastian</dc:creator> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/29"/> <dcterms:abstract xml:lang="eng">Copper and zinc were introduced into mesoporous siliceous matrices with the goal of obtaining model methanol synthesis catalysts with intense interaction between copper and the ZnO promoter. The preparation methods included various aqueous routes starting from acetate solutions (into MCM-48) and a route involving an organometallic step thermolysis of a liquid heterocubane of Zn4O4 type ([CH3ZnOCH2CH2OCH3]4) in a wormhole-type silica of 5 nm average pore size followed by aqueous Cu (nitrate) impregnation. The materials were characterized by XRD, nitrogen physisorption, N2O frontal chromatography, TPR, and EXAFS, and their methanol synthesis activity was measured at 493 K and normal pressure. In the aqueous preparations with acetate solutions, excessive formation of silicates (particularly zinc silicate) led to damage of the pore system. A significant delay in Cu reduction was assigned to the influence of micropores formed, together with some copper silicate formation. These samples exhibited poorly accessible Cu surface areas despite small Cu particle sizes indicated by EXAFS and disappointing methanol synthesis activity. In contrast to this, a highly active catalyst was obtained via the heterocubane route that meets industrial standards in terms of reaction rate per Cu surface area. Orientation studies (EXAFS at the CuK and ZnK edges) reflecting a redox behavior of the ZnOx component illustrate the potential of this catalyst type for use in basic studies of the Cu ZnOx interaction in methanol synthesis catalysts.</dcterms:abstract> <dc:creator>Tkachenko, Olga P.</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T18:13:10Z</dc:date> <dcterms:issued>2006</dcterms:issued> <dc:contributor>Khodeir, Lamma</dc:contributor> <dcterms:bibliographicCitation>First publ. in: Journal of Catalysis 241 (2006), 2, pp. 446-455</dcterms:bibliographicCitation> <dc:contributor>Klementiev, Konstantin V.</dc:contributor> <dc:contributor>Tkachenko, Olga P.</dc:contributor> <dcterms:title>Cu/ZnO aggregates in siliceous mesoporous matrices : development of a new model methanol synthesis catalyst</dcterms:title> </rdf:Description> </rdf:RDF>

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Cu_ZnO_aggregates_in_siliceous_mesoporous_matrices.pdf 213

Das Dokument erscheint in:

deposit-license Solange nicht anders angezeigt, wird die Lizenz wie folgt beschrieben: deposit-license

KOPS Suche


Stöbern

Mein Benutzerkonto