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 | United States |
| City | San Francisco, CA |
| Period | 11/12/06 → 11/17/06 |
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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
}
TY - GEN
T1 - Improved Co oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO2 catalysts
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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UR - http://www.scopus.com/inward/citedby.url?scp=58049095635&partnerID=8YFLogxK
M3 - Conference contribution
SN - 081691012X
SN - 9780816910120
BT - AIChE Annual Meeting, Conference Proceedings
ER -