Enhanced carbon monoxide oxidation activity over gold-ceria nanocomposites

Zhi Chen; Qiuming Gao

doi:10.1016/j.apcatb.2008.06.012

Enhanced carbon monoxide oxidation activity over gold-ceria nanocomposites

Zhi Chen
, Qiuming Gao^*

^*Corresponding author for this work

CAS - Shanghai Institute of Ceramics

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial and environment-benign sol-gel process. These materials were characterized by XRD, ICP, BET, UV-vis absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a high ratio of Au³⁺/Au⁰ in the nanocomposites.

Original language	English
Pages (from-to)	790-796
Number of pages	7
Journal	Applied Catalysis B: Environmental
Volume	84
Issue number	3-4
DOIs	https://doi.org/10.1016/j.apcatb.2008.06.012
State	Published - 1 Dec 2008
Externally published	Yes

Keywords

CO oxidation
Enhanced catalytic activity
Gold-ceria nanocomposites
Low content of Au

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10.1016/j.apcatb.2008.06.012

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title = "Enhanced carbon monoxide oxidation activity over gold-ceria nanocomposites",

abstract = "The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial and environment-benign sol-gel process. These materials were characterized by XRD, ICP, BET, UV-vis absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a high ratio of Au3+/Au0 in the nanocomposites.",

keywords = "CO oxidation, Enhanced catalytic activity, Gold-ceria nanocomposites, Low content of Au",

author = "Zhi Chen and Qiuming Gao",

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doi = "10.1016/j.apcatb.2008.06.012",

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TY - JOUR

T1 - Enhanced carbon monoxide oxidation activity over gold-ceria nanocomposites

AU - Chen, Zhi

AU - Gao, Qiuming

PY - 2008/12/1

Y1 - 2008/12/1

N2 - The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial and environment-benign sol-gel process. These materials were characterized by XRD, ICP, BET, UV-vis absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a high ratio of Au3+/Au0 in the nanocomposites.

AB - The composites with nanosized gold loaded in nanoporous ceria were prepared on a large scale by a facial and environment-benign sol-gel process. These materials were characterized by XRD, ICP, BET, UV-vis absorption, XPS, HRTEM and EDX. The main factors such as size and surface state of the Au and defect in the ceria could be adjusted by acid treatment of the composites in ascorbic acid solution to improve the activity and decrease the content of noble metal Au in the materials. Enhanced catalytic activities were obtained for the CO oxidation reaction over the catalysts due to the small crystal sizes with narrow size distributions of gold nanoparticles, a large amount of defects in the nanoporous ceria support, as well as a high ratio of Au3+/Au0 in the nanocomposites.

KW - CO oxidation

KW - Enhanced catalytic activity

KW - Gold-ceria nanocomposites

KW - Low content of Au

UR - https://www.scopus.com/pages/publications/53949083088

U2 - 10.1016/j.apcatb.2008.06.012

DO - 10.1016/j.apcatb.2008.06.012

M3 - 文章

AN - SCOPUS:53949083088

SN - 0926-3373

VL - 84

SP - 790

EP - 796

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 3-4

ER -

Enhanced carbon monoxide oxidation activity over gold-ceria nanocomposites

Abstract

Keywords

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