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 proceedingConference 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 languageEnglish
Title of host publicationAIChE Annual Meeting, Conference Proceedings
StatePublished - Dec 1 2006
Externally publishedYes
Event2006 AIChE Annual Meeting - San Francisco, CA, United States
Duration: Nov 12 2006Nov 17 2006

Other

Other2006 AIChE Annual Meeting
CountryUnited States
CitySan Francisco, CA
Period11/12/0611/17/06

Fingerprint

Carbon Monoxide
Hydrogen
Oxidation
Catalysts
San Francisco
Heating
Catalytic Domain

ASJC Scopus subject areas

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

Cite this

Siani, A., Captain, B., Alexeev, O. S., Stafyla, E., Hungria, A. B., Midgley, P. A., ... Amiridis, M. D. (2006). Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts. In AIChE Annual Meeting, Conference Proceedings

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 proceedingConference contribution

Siani, A, Captain, B, Alexeev, OS, Stafyla, E, Hungria, AB, Midgley, PA, Thomas, JM, Adams, RD & Amiridis, MD 2006, Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts. in AIChE Annual Meeting, Conference Proceedings. 2006 AIChE Annual Meeting, San Francisco, CA, United States, 11/12/06.
Siani A, Captain B, Alexeev OS, Stafyla E, Hungria AB, Midgley PA et al. Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts. In AIChE Annual Meeting, Conference Proceedings. 2006
Siani, Attilio ; Captain, Burjor ; Alexeev, Oleg S. ; Stafyla, Eirini ; Hungria, Ana B. ; Midgley, Paul A. ; Thomas, John M. ; Adams, Richard D. ; Amiridis, Michael D. / Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts. AIChE Annual Meeting, Conference Proceedings. 2006.
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AU - Hungria, Ana B.

AU - Midgley, Paul A.

AU - Thomas, John M.

AU - Adams, Richard D.

AU - Amiridis, Michael D.

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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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