Influence of the metal precursor on the catalytic behavior of Pt/Ceria catalysts in the preferential oxidation of CO in the presence of H2 (PROX)

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Title: Influence of the metal precursor on the catalytic behavior of Pt/Ceria catalysts in the preferential oxidation of CO in the presence of H2 (PROX)
Authors: Jardim, Erika de Oliveira | Rico Francés, Soledad | Coloma, Fernando | Anderson, James A. | Silvestre-Albero, Joaquín | Sepúlveda-Escribano, Antonio
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Metal precursor | Pt | Ceria | PROX | DRIFTS
Knowledge Area: Química Inorgánica
Issue Date: 1-Apr-2015
Publisher: Elsevier
Citation: Journal of Colloid and Interface Science. 2015, 443: 45-55. doi:10.1016/j.jcis.2014.12.013
Abstract: The effect of the metal precursor (presence or absence of chlorine) on the preferential oxidation of CO in the presence of H2 over Pt/CeO2 catalysts has been studied. The catalysts are prepared using (Pt(NH3)4)(NO3)2 and H2PtCl6, as precursors, in order to ascertain the effect of the chlorine species on the chemical properties of the support and on the catalytic behavior of these systems in the PROX reaction. The results show that chloride species exert an important effect on the redox properties of the oxide support due to surface chlorination. Consequently, the chlorinated catalyst exhibits a poorer catalytic activity at low temperatures compared with the chlorine-free catalyst, and this is accompanied by a higher selectivity to CO2 even at high reaction temperatures. It is proposed that the CO oxidation mechanism follows different pathways on each catalyst.
Sponsor: The authors gratefully acknowledge financial support from Ministerio de Ciencia e Innovación (Project MAT2010-21147) and Generalitat Valenciana (PROMETEO/2009/002 – FEDER and PROMETEOII/2014/004) (Spain). EOJ thanks the CNPq – Brazil for her grant.
URI: http://hdl.handle.net/10045/57826
ISSN: 0021-9797 (Print) | 1095-7103 (Online)
DOI: 10.1016/j.jcis.2014.12.013
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier Inc.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.jcis.2014.12.013
Appears in Collections:INV - LMA - Artículos de Revistas

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