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)

Erika O Jardim; Soledad Rico-Francés; Fernando Coloma; James A Anderson; Joaquín Silvestre-Albero; Antonio Sepúlveda-Escribano

doi:10.1016/j.jcis.2014.12.013

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)

Erika O Jardim, Soledad Rico-Francés, Fernando Coloma, James A Anderson, Joaquín Silvestre-Albero, Antonio Sepúlveda-Escribano

University of Alicante

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

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.

Original language	English
Pages (from-to)	45-55
Number of pages	11
Journal	Journal of Colloid and Interface Science
Volume	443
Early online date	10 Dec 2014
DOIs	https://doi.org/10.1016/j.jcis.2014.12.013
Publication status	Published - 1 Apr 2015

Bibliographical note

Copyright © 2014 Elsevier Inc. All rights reserved.

Acknowledgments
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. We thank S.B. Campbell and F.M. McKenna (University of Aberdeen) for assistance in performing the DRIFT experiments.

Keywords

metal precursor
Pt
Ceria
PROX
drifts

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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)",

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.",

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note = "Copyright {\textcopyright} 2014 Elsevier Inc. All rights reserved. Acknowledgments The authors gratefully acknowledge financial support from Ministerio de Ciencia e Innovaci{\'o}n (Project MAT2010-21147) and Generalitat Valenciana (PROMETEO/2009/002 – FEDER and PROMETEOII/2014/004) (Spain). EOJ thanks the CNPq – Brazil for her grant. We thank S.B. Campbell and F.M. McKenna (University of Aberdeen) for assistance in performing the DRIFT experiments.",

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AU - Jardim, Erika O

AU - Rico-Francés, Soledad

AU - Coloma, Fernando

AU - Anderson, James A

AU - Silvestre-Albero, Joaquín

AU - Sepúlveda-Escribano, Antonio

N1 - Copyright © 2014 Elsevier Inc. All rights reserved. Acknowledgments 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. We thank S.B. Campbell and F.M. McKenna (University of Aberdeen) for assistance in performing the DRIFT experiments.

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N2 - 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.

AB - 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.

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KW - Pt

KW - Ceria

KW - PROX

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SN - 0021-9797

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JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

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)

Abstract

Bibliographical note

Keywords

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