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Dynamical Changes in the Cu-ZnOx Interaction Observed in a Model Methanol Synthesis Catalyst

Dynamical Changes in the Cu-ZnOx Interaction Observed in a Model Methanol Synthesis Catalyst

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VAN DEN BERG, Maurits W. E., Sebastian POLARZ, Olga P. TKACHENKO, Kolja KÄHLER, Martin MUHLER, Wolfgang GRÜNERT, 2009. Dynamical Changes in the Cu-ZnOx Interaction Observed in a Model Methanol Synthesis Catalyst. In: Catalysis Letters. 128(1/2), pp. 49-56. ISSN 1011-372X. eISSN 1572-879X

@article{Van den Berg2009Dynam-1061, title={Dynamical Changes in the Cu-ZnOx Interaction Observed in a Model Methanol Synthesis Catalyst}, year={2009}, doi={10.1007/s10562-008-9746-4}, number={1/2}, volume={128}, issn={1011-372X}, journal={Catalysis Letters}, pages={49--56}, author={Van den Berg, Maurits W. E. and Polarz, Sebastian and Tkachenko, Olga P. and Kähler, Kolja and Muhler, Martin and Grünert, Wolfgang} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/1061"> <dc:creator>Van den Berg, Maurits W. E.</dc:creator> <dc:creator>Muhler, Martin</dc:creator> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103416863-3868037-7"/> <dc:contributor>Tkachenko, Olga P.</dc:contributor> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-22T17:55:01Z</dc:date> <dc:contributor>Van den Berg, Maurits W. E.</dc:contributor> <dc:rights>deposit-license</dc:rights> <dc:contributor>Muhler, Martin</dc:contributor> <dc:creator>Grünert, Wolfgang</dc:creator> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/1061"/> <dcterms:title>Dynamical Changes in the Cu-ZnOx Interaction Observed in a Model Methanol Synthesis Catalyst</dcterms:title> <dc:language>eng</dc:language> <dcterms:abstract xml:lang="eng">A systematic series of model methanol synthesis catalysts was prepared by sequential impregnation of a mesoporous silica material (5 nm average pore size) with an organometallic ZnO precursor which is liquid at room temperature, followed by the infiltration with an aqueous Cu nitrate solution. These catalysts, which contained 14 20 wt.% Cu and 1 5 wt.% Zn, were characterized by N2O reactive chemisorption, by EXAFS and by measuring their methanol synthesis activities. It was observed that the formation of confined, nanocrystalline ZnO prior to copper infiltration is of major importance for the development of catalyst activity. Severe reduction of properly prepared catalysts (10% CO/H2, 673 K, 15 min) leads to the emergence of a new feature in the ZnK EXAFS spectrum which was assigned to a Cu neighbour by combined evidence from the ZnK EXAFS and XANES regions. The zinc oxide component was partially reduced as well, but Zn(0) was not formed to any significant extent. Catalysts which developed this Cu Zn2+ interaction under severe reduction were superior in terms of methanol synthesis rate per m2 Cu surface area to a sample which did not exhibit this feature.</dcterms:abstract> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-22T17:55:01Z</dcterms:available> <dc:creator>Polarz, Sebastian</dc:creator> <dc:creator>Tkachenko, Olga P.</dc:creator> <dc:contributor>Grünert, Wolfgang</dc:contributor> <dc:contributor>Kähler, Kolja</dc:contributor> <dcterms:issued>2009</dcterms:issued> <dcterms:bibliographicCitation>Publ. in: Catalysis Letters 128 (2009), 1/2, pp. 49-56</dcterms:bibliographicCitation> <dc:contributor>Polarz, Sebastian</dc:contributor> <dc:creator>Kähler, Kolja</dc:creator> </rdf:Description> </rdf:RDF>

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