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dc.contributor.author
Briand, Laura Estefania
dc.contributor.author
Farneth, William E.
dc.contributor.author
Wachs, Israel E.
dc.date.available
2018-04-19T14:14:23Z
dc.date.issued
2000-11
dc.identifier.citation
Briand, Laura Estefania; Farneth, William E.; Wachs, Israel E.; Quantitative determination of the number of active surface sites and the turnover frequencies for methanol oxidation over metal oxide catalysts: I. Fundamentals of the methanol chemisorption technique and application to monolayer supported molybdenum oxide catalysts; Elsevier Science; Catalysis Today; 62; 2-3; 11-2000; 219-229
dc.identifier.issn
0920-5861
dc.identifier.uri
http://hdl.handle.net/11336/42624
dc.description.abstract
A detailed study of the methanol chemisorption and oxidation processes on oxide surfaces allowed the development of a method to quantify the number of surface active sites (Ns) of metal oxide catalysts. In situ infrared analysis during methanol adsorption showed that molecular methanol and surface methoxy species are co-adsorbed on an oxide surface at room temperature, but only surface methoxy species are formed at 100°C. Thermal stability and products of decomposition of the adsorbed species were determined with temperature programmed reaction spectroscopy (TPRS) experiments. Controlled adsorption with methanol doses resulted in a stable monolayer of surface methoxy species on the oxide surfaces. The stoichiometry of methanol chemisorption resulted in one surface methoxy adsorbed per three Mo atoms for polymerized surface molybdenum oxide structures, regardless of surface molybdenum oxide coordination. The activity of the catalysts per surface active sites (turnover frequencies TOF) was calculated in order to quantitatively compare the reactivity of a series of monolayer supported molybdenum oxide catalysts. The TOF value trends reflect the influence of the bridging Mo-O-Support bond and the electronegativity of the metal cation of the oxide support.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Molybdenum Oxide Catalyst
dc.subject
Surface Active Sites
dc.subject
Methanol Oxidation
dc.subject
Methanol Chemisorption;
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Turnover Frequency
dc.subject
Tprs
dc.subject.classification
Otras Ingeniería Química
dc.subject.classification
Ingeniería Química
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Quantitative determination of the number of active surface sites and the turnover frequencies for methanol oxidation over metal oxide catalysts: I. Fundamentals of the methanol chemisorption technique and application to monolayer supported molybdenum oxide catalysts
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-16T13:56:33Z
dc.journal.volume
62
dc.journal.number
2-3
dc.journal.pagination
219-229
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Briand, Laura Estefania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigación y Desarrollo en Ciencias Aplicadas ; Argentina
dc.description.fil
Fil: Farneth, William E.. E. I. du Pont de Nemours and Company; Estados Unidos
dc.description.fil
Fil: Wachs, Israel E.. Lehigh University; Estados Unidos
dc.journal.title
Catalysis Today
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/S0920-5861(00)00423-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0920586100004235


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