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dc.contributor.authorSchick, Lukases_ES
dc.contributor.authorSanchis, Rutes_ES
dc.contributor.authorGonzález-Alfaro, Vicentees_ES
dc.contributor.authorAgouram, S.es_ES
dc.contributor.authorLópez Sebastián, José Manueles_ES
dc.contributor.authorTorrente-Murciano, Lauraes_ES
dc.contributor.authorGarcía Martínez, Tomáses_ES
dc.contributor.authorSolsona, Benjamínes_ES
dc.identifier.citationChemical Engineering Journal 366: 100-111 (2019)es_ES
dc.description12 Figuras, 2 Tablas.-- Datos suplementarios disponibles en línea en la página web del editor.es_ES
dc.description.abstractThis systematic catalytic study reveals for the first time a strong size-activity relationship of iridium-based catalysts for the total oxidation of short chain alkanes reaction. Silica has been selected as support for its inertness and weak silica-iridium interaction to avoid its contribution to the catalytic activity. The size of the iridium particles can be increased from ∼5 to 27 nm by increasing the calcination temperature from 350 to 750 °C. Unlike other precious metals such as palladium or platinum, in the case of iridium catalysts, the oxidation activity increases when the size decreases. This effect is also maintained when the activity is normalized per metallic surface area revealing a higher intrinsic activity as the iridium size decreases beyond its simple increase in metallic surface area. Indeed, as the particle size decreases, a higher proportion of highly reducible iridium species as well as an increase in defective Ir3+ species on the surface is observed by XPS, directly related to the enhanced activity. The highly reducible species are oxidized under the reaction conditions, leading to an initial decrease in activity before reaching a stable rate of oxidation reaction. This knowledge provides useful guidelines for the design of iridium-based systems for the total oxidation of volatile organic compounds at low temperatures.es_ES
dc.description.sponsorshipAuthors from UV thank the University of Valencia (UV-INV-AE16-484416 project) and MINECO (MAT2017-84118-C2-1-R project) for funding. Mathias Van de Vyver is acknowledged for the Raman study. T.G. would also like to thank the Regional Government of Aragón (DGA) for the support provided under the research groups support programme.es_ES
dc.subjectShort chain alkaneses_ES
dc.subjectTotal oxidationes_ES
dc.subjectSize-activity relationshipes_ES
dc.titleSize-activity relationship of iridium particles supported on silica for the total oxidation of volatile organic compounds (VOCs)es_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Ciencia, Innovación y Universidades (España)es_ES
dc.contributor.funderUniversidad de Valenciaes_ES
dc.contributor.funderGobierno de Aragónes_ES
oprm.item.hasRevisionno ko 0 false*
dc.contributor.orcidAgouram, S. [0000-0002-9906-1174]es_ES
dc.contributor.orcidLópez Sebastián, José Manuel [0000-0002-6203-8835]es_ES
dc.contributor.orcidTorrente-Murciano, Laura [0000-0002-7938-2587]es_ES
dc.contributor.orcidGarcía Martínez, Tomás [0000-0003-4255-5998]es_ES
dc.contributor.orcidSolsona, Benjamín [0000-0001-7235-2038]es_ES
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