In-situ characterization of supported Au catalysts for CO oxidation

Colleen Costello, Jeff Yang, Harold H Kung, M. C. Kung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Au/γ-alumina prepared by deposition-precipitation was characterized by in-situ XANES and TPR to determine changes in the an oxidation state during activation for CO oxidation. As prepared, the sample was inactive without activation. It could be activated by various methods, e.g., heating at 100°C in H 2 followed by H 2 + H 2O. Treatment in dry H 2 at 100°C caused some reduction to Au(0) but with minimal increase in CO oxidation activity. Subsequent treatment with H 2O, however, caused further reduction of gold and the catalyst became quite active. Additional reduction and increase in activity occurred during reaction. The presence of Au(0) was thus necessary for activity. However, the presence of Au(0) alone was insufficient for high CO oxidation activity. In-situ XANES results showed no detectable differences among the active, thermally deactivated, and the regenerated samples. Thus, the degree of reduction of gold is an incomplete indication of activity. Water is also an important factor. This is an abstract of a paper presented at the 227th ACS National Meeting (Anaheim, CA 3/28/2004-4/1/2004).

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Volume227
Edition2
Publication statusPublished - 2004
Event227th ACS National Meeting Abstracts of Papers - Anaheim, CA., United States
Duration: Mar 28 2004Apr 1 2004

Other

Other227th ACS National Meeting Abstracts of Papers
CountryUnited States
CityAnaheim, CA.
Period3/28/044/1/04

Fingerprint

Carbon Monoxide
Catalyst supports
Oxidation
Gold
Chemical activation
Aluminum Oxide
Heating
Catalysts
Water

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Costello, C., Yang, J., Kung, H. H., & Kung, M. C. (2004). In-situ characterization of supported Au catalysts for CO oxidation. In ACS National Meeting Book of Abstracts (2 ed., Vol. 227)

In-situ characterization of supported Au catalysts for CO oxidation. / Costello, Colleen; Yang, Jeff; Kung, Harold H; Kung, M. C.

ACS National Meeting Book of Abstracts. Vol. 227 2. ed. 2004.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Costello, C, Yang, J, Kung, HH & Kung, MC 2004, In-situ characterization of supported Au catalysts for CO oxidation. in ACS National Meeting Book of Abstracts. 2 edn, vol. 227, 227th ACS National Meeting Abstracts of Papers, Anaheim, CA., United States, 3/28/04.
Costello C, Yang J, Kung HH, Kung MC. In-situ characterization of supported Au catalysts for CO oxidation. In ACS National Meeting Book of Abstracts. 2 ed. Vol. 227. 2004
Costello, Colleen ; Yang, Jeff ; Kung, Harold H ; Kung, M. C. / In-situ characterization of supported Au catalysts for CO oxidation. ACS National Meeting Book of Abstracts. Vol. 227 2. ed. 2004.
@inproceedings{c840422f2a294d71b98c78b519521eca,
title = "In-situ characterization of supported Au catalysts for CO oxidation",
abstract = "Au/γ-alumina prepared by deposition-precipitation was characterized by in-situ XANES and TPR to determine changes in the an oxidation state during activation for CO oxidation. As prepared, the sample was inactive without activation. It could be activated by various methods, e.g., heating at 100°C in H 2 followed by H 2 + H 2O. Treatment in dry H 2 at 100°C caused some reduction to Au(0) but with minimal increase in CO oxidation activity. Subsequent treatment with H 2O, however, caused further reduction of gold and the catalyst became quite active. Additional reduction and increase in activity occurred during reaction. The presence of Au(0) was thus necessary for activity. However, the presence of Au(0) alone was insufficient for high CO oxidation activity. In-situ XANES results showed no detectable differences among the active, thermally deactivated, and the regenerated samples. Thus, the degree of reduction of gold is an incomplete indication of activity. Water is also an important factor. This is an abstract of a paper presented at the 227th ACS National Meeting (Anaheim, CA 3/28/2004-4/1/2004).",
author = "Colleen Costello and Jeff Yang and Kung, {Harold H} and Kung, {M. C.}",
year = "2004",
language = "English",
volume = "227",
booktitle = "ACS National Meeting Book of Abstracts",
edition = "2",

}

TY - GEN

T1 - In-situ characterization of supported Au catalysts for CO oxidation

AU - Costello, Colleen

AU - Yang, Jeff

AU - Kung, Harold H

AU - Kung, M. C.

PY - 2004

Y1 - 2004

N2 - Au/γ-alumina prepared by deposition-precipitation was characterized by in-situ XANES and TPR to determine changes in the an oxidation state during activation for CO oxidation. As prepared, the sample was inactive without activation. It could be activated by various methods, e.g., heating at 100°C in H 2 followed by H 2 + H 2O. Treatment in dry H 2 at 100°C caused some reduction to Au(0) but with minimal increase in CO oxidation activity. Subsequent treatment with H 2O, however, caused further reduction of gold and the catalyst became quite active. Additional reduction and increase in activity occurred during reaction. The presence of Au(0) was thus necessary for activity. However, the presence of Au(0) alone was insufficient for high CO oxidation activity. In-situ XANES results showed no detectable differences among the active, thermally deactivated, and the regenerated samples. Thus, the degree of reduction of gold is an incomplete indication of activity. Water is also an important factor. This is an abstract of a paper presented at the 227th ACS National Meeting (Anaheim, CA 3/28/2004-4/1/2004).

AB - Au/γ-alumina prepared by deposition-precipitation was characterized by in-situ XANES and TPR to determine changes in the an oxidation state during activation for CO oxidation. As prepared, the sample was inactive without activation. It could be activated by various methods, e.g., heating at 100°C in H 2 followed by H 2 + H 2O. Treatment in dry H 2 at 100°C caused some reduction to Au(0) but with minimal increase in CO oxidation activity. Subsequent treatment with H 2O, however, caused further reduction of gold and the catalyst became quite active. Additional reduction and increase in activity occurred during reaction. The presence of Au(0) was thus necessary for activity. However, the presence of Au(0) alone was insufficient for high CO oxidation activity. In-situ XANES results showed no detectable differences among the active, thermally deactivated, and the regenerated samples. Thus, the degree of reduction of gold is an incomplete indication of activity. Water is also an important factor. This is an abstract of a paper presented at the 227th ACS National Meeting (Anaheim, CA 3/28/2004-4/1/2004).

UR - http://www.scopus.com/inward/record.url?scp=2442584489&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2442584489&partnerID=8YFLogxK

M3 - Conference contribution

VL - 227

BT - ACS National Meeting Book of Abstracts

ER -