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Pt-impregnated catalysts on powdery SiC and other commercial supports for the combustion of hydrogen under oxidant conditions

 

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dc.creator Arzac, G. M. es
dc.creator Montes, O. es
dc.creator Fernández Camacho, Asunción es
dc.date.accessioned 2018-11-15T15:31:05Z
dc.date.available 2018-11-15T15:31:05Z
dc.date.issued 2016
dc.identifier.citation Arzar de Calvo, G.M., Montes, O. y Fernández Camacho, M.A. (2016). Pt-impregnated catalysts on powdery SiC and other commercial supports for the combustion of hydrogen under oxidant conditions. Applied Catalysis B - Environmental, 201, 391-399.
dc.identifier.issn 0926-3373 es
dc.identifier.uri https://hdl.handle.net/11441/80246
dc.description.abstract We report the study of the catalytic hydrogen combustion over Pt-impregnated powdery silicon carbide (SiC) using H2PtCl6 as precursor. The reaction was conducted in excess of oxygen. β-SiC was selected for the study because of its thermal conductivity, mechanical properties, chemical inertness and surface area. The obtained Pt particles over SiC were medium size (average particle diameter of 5 nm for 0.5 wt% Pt). The activity of the Pt-impregnated catalyst over SiC was compared to those obtained in oxidized form over TiO2 and Al2O3 commercial supports (Pt particles very small in size, average particle diameter of 1 nm for 0.5 wt% Pt in both cases). The case of a SiO2 support was also discussed. Those Pt/SiC particles were the most active because of their higher contribution of surface Pt0, indicating that partially oxidized surfaces have better activity than those totally oxidized in these conditions. SiC was modified with an acid treatment and thus bigger (average particle diameter of 7 nm for 0.5 wt% Pt) and more active Pt particles were obtained. Durability of the SiC and TiO2 supported catalysts was tested upon 5 cycles and both have shown to be durable and even more active than initially. Exposure to the oxidative reaction mixture activates the catalysts and the effect is more pronounced for the completely oxidized particles. This is due to the surface oxygen chemisorption which activates catalystś surface. es
dc.description.sponsorship Junta de Andalucía PE2012-TEP862 es
dc.description.sponsorship Ministerio de Economía y Competitividad CTQ2012-32519, CTQ2015-65918-R es
dc.description.sponsorship Consejo Superior de Investigaciones Científicas PIE-201460E018 es
dc.format application/pdf es
dc.language.iso eng es
dc.publisher Elsevier es
dc.relation.ispartof Applied Catalysis B - Environmental, 201, 391-399.
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 Internacional *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ *
dc.subject Hydrogen es
dc.subject Catalytic combustion es
dc.subject Pt-impregnated catalysts es
dc.subject Powdery SiC es
dc.title Pt-impregnated catalysts on powdery SiC and other commercial supports for the combustion of hydrogen under oxidant conditions es
dc.type info:eu-repo/semantics/article es
dc.type.version info:eu-repo/semantics/acceptedVersion es
dc.rights.accessrights info:eu-repo/semantics/openAccess es
dc.contributor.affiliation Instituto de Ciencia de Materiales de Sevilla (ICMS) – CIC Cartuja es
dc.relation.projectID PE2012-TEP862 es
dc.relation.projectID CTQ2012-32519 es
dc.relation.projectID CTQ2015-65918-R es
dc.relation.projectID PIE-201460E018 es
dc.relation.publisherversion http://dx.doi.org/10.1016/j.apcatb.2016.08.042 es
dc.identifier.doi 10.1016/j.apcatb.2016.08.042 es
idus.format.extent 37 p. es
dc.journaltitle Applied Catalysis B - Environmental es
dc.publication.volumen 201 es
dc.publication.initialPage 391 es
dc.publication.endPage 399 es
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