Rational design of gold catalysts with enhanced thermal stability: Post modification of Au/TiO2 by amorphous SiO2 decoration

Haoguo Zhu; Zhen Ma; Steven H. Overbury; Sheng Dai

doi:10.1007/s10562-007-9144-3

Rational design of gold catalysts with enhanced thermal stability: Post modification of Au/TiO₂ by amorphous SiO₂ decoration

Haoguo Zhu, Zhen Ma, Steven H. Overbury, Sheng Dai

Chemical Sciences Division

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

65 Scopus citations

Abstract

Au/TiO₂ is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO₂ catalysts were post decorated by amorphous SiO₂ to suppress the agglomeration of gold particles. Even after being aged in O₂-He at 700 °C, the SiO₂-decorated Au/TiO₂ was still active for CO oxidation at ambient temperature.

Original language	English
Pages (from-to)	128-135
Number of pages	8
Journal	Catalysis Letters
Volume	116
Issue number	3-4
DOIs	https://doi.org/10.1007/s10562-007-9144-3
State	Published - Aug 2007

Funding

This work was supported by the Office of Basic Energy Sciences, U.S. Department of Energy. The Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the U.S. DOE under Contract DE-AC05– 00OR22725. This research was supported in part by the appointment for H.G. Zhu and Z. Ma to the ORNL Research Associates Program, administered jointly by

Funders	Funder number
U.S. Department of Energy	DE-AC05– 00OR22725
Basic Energy Sciences
Oak Ridge National Laboratory

Keywords

Alkoxysilanes
CO oxidation
Gold nanoparticles
Post decoration
Promotion
Sintering

Access to Document

10.1007/s10562-007-9144-3

Cite this

@article{0a3cc034804a4d028a9b3e83dd29c3dd,

title = "Rational design of gold catalysts with enhanced thermal stability: Post modification of Au/TiO2 by amorphous SiO2 decoration",

abstract = "Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O2-He at 700 °C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature.",

keywords = "Alkoxysilanes, CO oxidation, Gold nanoparticles, Post decoration, Promotion, Sintering",

author = "Haoguo Zhu and Zhen Ma and Overbury, {Steven H.} and Sheng Dai",

year = "2007",

month = aug,

doi = "10.1007/s10562-007-9144-3",

language = "English",

volume = "116",

pages = "128--135",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Springer",

number = "3-4",

}

TY - JOUR

T1 - Rational design of gold catalysts with enhanced thermal stability

T2 - Post modification of Au/TiO2 by amorphous SiO2 decoration

AU - Zhu, Haoguo

AU - Ma, Zhen

AU - Overbury, Steven H.

AU - Dai, Sheng

PY - 2007/8

Y1 - 2007/8

N2 - Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O2-He at 700 °C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature.

AB - Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O2-He at 700 °C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature.

KW - Alkoxysilanes

KW - CO oxidation

KW - Gold nanoparticles

KW - Post decoration

KW - Promotion

KW - Sintering

UR - http://www.scopus.com/inward/record.url?scp=34547636502&partnerID=8YFLogxK

U2 - 10.1007/s10562-007-9144-3

DO - 10.1007/s10562-007-9144-3

M3 - Article

AN - SCOPUS:34547636502

SN - 1011-372X

VL - 116

SP - 128

EP - 135

JO - Catalysis Letters

JF - Catalysis Letters

IS - 3-4

ER -