Supported Au catalysts for low temperature CO oxidation

Harold H Kung, M. C. Kung, C. K. Costello

Research output: Contribution to journalArticle

384 Citations (Scopus)

Abstract

Supported Au catalysts are very active for low temperature CO oxidation. However, the reported activity from different laboratories for apparently similar catalysts can differ quite substantially. Recent progress in resolving this difficulty is summarized. Residual chloride in the sample is a very effective poison of the active site. The effect of water vapor on the catalytic activity differs depending on the support and the residual chloride content. A model of the active site, which consists of an ensemble of metallic Au atoms and Au cations with hydroxyl ligands, the reaction mechanism for CO oxidation, and the mechanism for deactivation during reaction as well as regeneration are discussed with respect to the available data.

Original languageEnglish
Pages (from-to)425-432
Number of pages8
JournalJournal of Catalysis
Volume216
Issue number1-2
DOIs
Publication statusPublished - May 2003

Fingerprint

Carbon Monoxide
Catalyst supports
Chlorides
chlorides
catalysts
poisons
Oxidation
oxidation
Poisons
Steam
regeneration
Hydroxyl Radical
deactivation
Water vapor
water vapor
catalytic activity
Cations
Catalyst activity
Thermodynamic properties
Positive ions

Keywords

  • Active site
  • Catalyst
  • CO
  • Gold
  • Mechanism
  • Oxidation

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

Supported Au catalysts for low temperature CO oxidation. / Kung, Harold H; Kung, M. C.; Costello, C. K.

In: Journal of Catalysis, Vol. 216, No. 1-2, 05.2003, p. 425-432.

Research output: Contribution to journalArticle

Kung, Harold H ; Kung, M. C. ; Costello, C. K. / Supported Au catalysts for low temperature CO oxidation. In: Journal of Catalysis. 2003 ; Vol. 216, No. 1-2. pp. 425-432.
@article{f180add37abb407ea01484f1a0c87af9,
title = "Supported Au catalysts for low temperature CO oxidation",
abstract = "Supported Au catalysts are very active for low temperature CO oxidation. However, the reported activity from different laboratories for apparently similar catalysts can differ quite substantially. Recent progress in resolving this difficulty is summarized. Residual chloride in the sample is a very effective poison of the active site. The effect of water vapor on the catalytic activity differs depending on the support and the residual chloride content. A model of the active site, which consists of an ensemble of metallic Au atoms and Au cations with hydroxyl ligands, the reaction mechanism for CO oxidation, and the mechanism for deactivation during reaction as well as regeneration are discussed with respect to the available data.",
keywords = "Active site, Catalyst, CO, Gold, Mechanism, Oxidation",
author = "Kung, {Harold H} and Kung, {M. C.} and Costello, {C. K.}",
year = "2003",
month = "5",
doi = "10.1016/S0021-9517(02)00111-2",
language = "English",
volume = "216",
pages = "425--432",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "Academic Press Inc.",
number = "1-2",

}

TY - JOUR

T1 - Supported Au catalysts for low temperature CO oxidation

AU - Kung, Harold H

AU - Kung, M. C.

AU - Costello, C. K.

PY - 2003/5

Y1 - 2003/5

N2 - Supported Au catalysts are very active for low temperature CO oxidation. However, the reported activity from different laboratories for apparently similar catalysts can differ quite substantially. Recent progress in resolving this difficulty is summarized. Residual chloride in the sample is a very effective poison of the active site. The effect of water vapor on the catalytic activity differs depending on the support and the residual chloride content. A model of the active site, which consists of an ensemble of metallic Au atoms and Au cations with hydroxyl ligands, the reaction mechanism for CO oxidation, and the mechanism for deactivation during reaction as well as regeneration are discussed with respect to the available data.

AB - Supported Au catalysts are very active for low temperature CO oxidation. However, the reported activity from different laboratories for apparently similar catalysts can differ quite substantially. Recent progress in resolving this difficulty is summarized. Residual chloride in the sample is a very effective poison of the active site. The effect of water vapor on the catalytic activity differs depending on the support and the residual chloride content. A model of the active site, which consists of an ensemble of metallic Au atoms and Au cations with hydroxyl ligands, the reaction mechanism for CO oxidation, and the mechanism for deactivation during reaction as well as regeneration are discussed with respect to the available data.

KW - Active site

KW - Catalyst

KW - CO

KW - Gold

KW - Mechanism

KW - Oxidation

UR - http://www.scopus.com/inward/record.url?scp=0038344682&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038344682&partnerID=8YFLogxK

U2 - 10.1016/S0021-9517(02)00111-2

DO - 10.1016/S0021-9517(02)00111-2

M3 - Article

AN - SCOPUS:0038344682

VL - 216

SP - 425

EP - 432

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

IS - 1-2

ER -