Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts

Attilio Siani; Burjor Captain; Oleg S. Alexeev; Eirini Stafyla; Ana B. Hungria; Paul A. Midgley; John M. Thomas; Richard D. Adams; Michael D. Amiridis

Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO₂ catalysts

Attilio Siani, Burjor Captain, Oleg S. Alexeev, Eirini Stafyla, Ana B. Hungria, Paul A. Midgley, John M. Thomas, Richard D. Adams, Michael D. Amiridis

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The catalytic performance of cluster-derived PtFe/SiO₂ bimetallic catalysts for the oxidation of CO was examined in the absence and presence of H₂ and compared to that of Pt/SiO₂. The clusters remained weakly bonded to the SiO₂ surface and could be removed by extraction with CH₂Cl₂ without any changes in their structure. Subsequent heating in H₂ flow resulted in complete decarbonylation of the supported clusters at approximately 350°C and the formation of bimetallic particles that were more active for CO oxidation than either Pt/SiO₂ or a conventionally-prepared PtFe/SiO₂ sample. The Pt5Fe₂/SiO₂ sample was also more active than Pt/SiO₂ for preferential oxidation (PROX) with a selectivity of approximately 92% at up to 60°C. In this case the deactivation with time on stream was substantially lower, suggesting that the highly reducing environment under the Fe bimetallic PROX conditions helps to maintain the properties of the active Pt sites. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

Original language	English
Title of host publication	AIChE Annual Meeting, Conference Proceedings
State	Published - Dec 1 2006
Externally published	Yes
Event	2006 AIChE Annual Meeting - San Francisco, CA, United States Duration: Nov 12 2006 → Nov 17 2006

Other

Other	2006 AIChE Annual Meeting
Country/Territory	United States
City	San Francisco, CA
Period	11/12/06 → 11/17/06

ASJC Scopus subject areas

Biotechnology
Chemical Engineering(all)
Bioengineering
Safety, Risk, Reliability and Quality

Cite this

Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO₂ catalysts. / Siani, Attilio; Captain, Burjor; Alexeev, Oleg S.; Stafyla, Eirini; Hungria, Ana B.; Midgley, Paul A.; Thomas, John M.; Adams, Richard D.; Amiridis, Michael D.

AIChE Annual Meeting, Conference Proceedings. 2006.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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title = "Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts",

abstract = "The catalytic performance of cluster-derived PtFe/SiO2 bimetallic catalysts for the oxidation of CO was examined in the absence and presence of H2 and compared to that of Pt/SiO2. The clusters remained weakly bonded to the SiO2 surface and could be removed by extraction with CH2Cl2 without any changes in their structure. Subsequent heating in H2 flow resulted in complete decarbonylation of the supported clusters at approximately 350°C and the formation of bimetallic particles that were more active for CO oxidation than either Pt/SiO2 or a conventionally-prepared PtFe/SiO2 sample. The Pt5Fe2/SiO2 sample was also more active than Pt/SiO2 for preferential oxidation (PROX) with a selectivity of approximately 92% at up to 60°C. In this case the deactivation with time on stream was substantially lower, suggesting that the highly reducing environment under the Fe bimetallic PROX conditions helps to maintain the properties of the active Pt sites. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).",

author = "Attilio Siani and Burjor Captain and Alexeev, {Oleg S.} and Eirini Stafyla and Hungria, {Ana B.} and Midgley, {Paul A.} and Thomas, {John M.} and Adams, {Richard D.} and Amiridis, {Michael D.}",

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AU - Siani, Attilio

AU - Captain, Burjor

AU - Alexeev, Oleg S.

AU - Stafyla, Eirini

AU - Hungria, Ana B.

AU - Midgley, Paul A.

AU - Thomas, John M.

AU - Adams, Richard D.

AU - Amiridis, Michael D.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - The catalytic performance of cluster-derived PtFe/SiO2 bimetallic catalysts for the oxidation of CO was examined in the absence and presence of H2 and compared to that of Pt/SiO2. The clusters remained weakly bonded to the SiO2 surface and could be removed by extraction with CH2Cl2 without any changes in their structure. Subsequent heating in H2 flow resulted in complete decarbonylation of the supported clusters at approximately 350°C and the formation of bimetallic particles that were more active for CO oxidation than either Pt/SiO2 or a conventionally-prepared PtFe/SiO2 sample. The Pt5Fe2/SiO2 sample was also more active than Pt/SiO2 for preferential oxidation (PROX) with a selectivity of approximately 92% at up to 60°C. In this case the deactivation with time on stream was substantially lower, suggesting that the highly reducing environment under the Fe bimetallic PROX conditions helps to maintain the properties of the active Pt sites. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

AB - The catalytic performance of cluster-derived PtFe/SiO2 bimetallic catalysts for the oxidation of CO was examined in the absence and presence of H2 and compared to that of Pt/SiO2. The clusters remained weakly bonded to the SiO2 surface and could be removed by extraction with CH2Cl2 without any changes in their structure. Subsequent heating in H2 flow resulted in complete decarbonylation of the supported clusters at approximately 350°C and the formation of bimetallic particles that were more active for CO oxidation than either Pt/SiO2 or a conventionally-prepared PtFe/SiO2 sample. The Pt5Fe2/SiO2 sample was also more active than Pt/SiO2 for preferential oxidation (PROX) with a selectivity of approximately 92% at up to 60°C. In this case the deactivation with time on stream was substantially lower, suggesting that the highly reducing environment under the Fe bimetallic PROX conditions helps to maintain the properties of the active Pt sites. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).

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M3 - Conference contribution

SN - 081691012X

SN - 9780816910120

BT - AIChE Annual Meeting, Conference Proceedings

Y2 - 12 November 2006 through 17 November 2006

ER -

Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO₂ catalysts

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