Abstract
Transient experiments involving the saturation of the catalyst either with CO or O2, followed by admission of O2 or CO, were performed. Exposure of the activated catalysts to 10 mbar of CO at -60°C led to the formation of CO adsorbed species over only 13% of the gold. Admission of 25 mbar of O2 to the CO-saturated catalyst induced drastic changes on the nature and population of surface species. CO2 was readily formed at the expense of the highly active CO-Au species (2091/cm), at a turnover frequency (TOF) of 1.4 mole/mole Au-min. CO2 production was spread over a longer time scale, with a maximum TOF of 1 mole/mole Au-min. Whether the catalyst is initially saturated with CO or O2 before admitting the other reactant did not affect the total amount of CO2 generated. Transformation of CO into CO2 entailed a hydroxocarbonyl intermediate characterized by an absorption band at 1240/cm. Its rate of disappearing correlated with the rate of formation of CO2. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 1/04/2005).
| Original language | English |
|---|---|
| Title of host publication | AIChE Annual Meeting Conference Proceedings |
| Publisher | American Institute of Chemical Engineers |
| Volume | 2005 |
| ISBN (Print) | 0816909962, 9780816909964 |
| Publication status | Published - 2005 |
| Event | 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States Duration: Oct 30 2005 → Nov 4 2005 |
Other
| Other | 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase |
|---|---|
| Country | United States |
| City | Cincinnati, OH |
| Period | 10/30/05 → 11/4/05 |
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ASJC Scopus subject areas
- Energy(all)
Cite this
In-situ FTIR and XAS study of the evolution of surface species during transient Co oxidation on supported Au/Tio2. / Henao, Juan D.; Caputo, Tiziana; Yang, Jeff H.; Kung, Mayfair C.; Kung, Harold H.
AIChE Annual Meeting Conference Proceedings. Vol. 2005 American Institute of Chemical Engineers, 2005.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - In-situ FTIR and XAS study of the evolution of surface species during transient Co oxidation on supported Au/Tio2
AU - Henao, Juan D.
AU - Caputo, Tiziana
AU - Yang, Jeff H.
AU - Kung, Mayfair C.
AU - Kung, Harold H
PY - 2005
Y1 - 2005
N2 - Transient experiments involving the saturation of the catalyst either with CO or O2, followed by admission of O2 or CO, were performed. Exposure of the activated catalysts to 10 mbar of CO at -60°C led to the formation of CO adsorbed species over only 13% of the gold. Admission of 25 mbar of O2 to the CO-saturated catalyst induced drastic changes on the nature and population of surface species. CO2 was readily formed at the expense of the highly active CO-Au species (2091/cm), at a turnover frequency (TOF) of 1.4 mole/mole Au-min. CO2 production was spread over a longer time scale, with a maximum TOF of 1 mole/mole Au-min. Whether the catalyst is initially saturated with CO or O2 before admitting the other reactant did not affect the total amount of CO2 generated. Transformation of CO into CO2 entailed a hydroxocarbonyl intermediate characterized by an absorption band at 1240/cm. Its rate of disappearing correlated with the rate of formation of CO2. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 1/04/2005).
AB - Transient experiments involving the saturation of the catalyst either with CO or O2, followed by admission of O2 or CO, were performed. Exposure of the activated catalysts to 10 mbar of CO at -60°C led to the formation of CO adsorbed species over only 13% of the gold. Admission of 25 mbar of O2 to the CO-saturated catalyst induced drastic changes on the nature and population of surface species. CO2 was readily formed at the expense of the highly active CO-Au species (2091/cm), at a turnover frequency (TOF) of 1.4 mole/mole Au-min. CO2 production was spread over a longer time scale, with a maximum TOF of 1 mole/mole Au-min. Whether the catalyst is initially saturated with CO or O2 before admitting the other reactant did not affect the total amount of CO2 generated. Transformation of CO into CO2 entailed a hydroxocarbonyl intermediate characterized by an absorption band at 1240/cm. Its rate of disappearing correlated with the rate of formation of CO2. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 1/04/2005).
UR - http://www.scopus.com/inward/record.url?scp=84916941197&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916941197&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84916941197
SN - 0816909962
SN - 9780816909964
VL - 2005
BT - AIChE Annual Meeting Conference Proceedings
PB - American Institute of Chemical Engineers
ER -