Sauerstoff- und Stickstoff-Chemisorption an Metallclustern

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STOLCIC, Davor, 2003. Sauerstoff- und Stickstoff-Chemisorption an Metallclustern [Dissertation]. Konstanz: University of Konstanz

@phdthesis{Stolcic2003Sauer-5003, title={Sauerstoff- und Stickstoff-Chemisorption an Metallclustern}, year={2003}, author={Stolcic, Davor}, address={Konstanz}, school={Universität Konstanz} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:rights rdf:resource=""/> <dcterms:hasPart rdf:resource=""/> <dcterms:issued>2003</dcterms:issued> <dspace:isPartOfCollection rdf:resource=""/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:rights>terms-of-use</dc:rights> <dc:creator>Stolcic, Davor</dc:creator> <dcterms:isPartOf rdf:resource=""/> <dcterms:alternative>Oxygen and Nitrogen Chemisorption on Metal Clusters</dcterms:alternative> <dcterms:title>Sauerstoff- und Stickstoff-Chemisorption an Metallclustern</dcterms:title> <dc:date rdf:datatype="">2011-03-24T14:52:25Z</dc:date> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:language>deu</dc:language> <dcterms:abstract xml:lang="eng">Anion Photoelectron Spectroscopy is a powerful tool for the investigation of the electronic structure of clusters. In this work three investigations are carried out with this method: Using photoelectron spectroscopy and first principle molecular orbital calculations the first observation of a metal-semiconductor transition with increasing number of Oxygen atoms in Tungsten oxide is observed. Tungsten oxide clusters with up to six Tungsten atoms and up to twelve Oxygen atoms were investigated. The transition is caused by the cleavage of the metal-metal bonds. The W4O12 cluster is shown to be a so called baby crystal. This cluster bears all the hallmarks of bulk tungsten oxide, WO3. Contrary to the conventional understanding that atomic clusters usually differ in properties and structure from the bulk constituents of which they are comprised. The second part of this work is about the Nitrogen chemisorption on Tungsten clusters up to four Tungsten atoms. On the Tungsten atom the Nitrogen chemisorbs molecularly, whereas on the Tungsten tetramer dissociative chemisorption is observed. This chemisorption state is metastable. The chemisorption state of the Nitrogen molecule on the Tungsten dimer and trimer could not be determined clearly. In the third part of this dissertation the chemisorption of Oxygen on Gold clusters is investigated. The Oxygen chemisorbs molecularly on the Gold dimer and tetramer, whereas on the Gold atom the chemisorption is dissociative. Altogether the results show, that experiments using free gas-phase clusters in combination with related calculations provide crucial information about their geometrical and electronical properties. For example, thus one may obtain molecular-level understanding of catalysts consisting of nanomaterials.</dcterms:abstract> <dc:contributor>Stolcic, Davor</dc:contributor> <dspace:hasBitstream rdf:resource=""/> <dc:format>application/pdf</dc:format> <dcterms:available rdf:datatype="">2011-03-24T14:52:25Z</dcterms:available> <bibo:uri rdf:resource=""/> </rdf:Description> </rdf:RDF>

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