Low-temperature CO oxidation on Au/fumed SiO2-based catalysts prepared from Au(en)2Cl3 precursor

Haoguo Zhu; Zhen Ma; Jason C. Clark; Zhengwei Pan; Steven H. Overbury; Sheng Dai

doi:10.1016/j.apcata.2007.04.004

Low-temperature CO oxidation on Au/fumed SiO₂-based catalysts prepared from Au(en)₂Cl₃ precursor

Haoguo Zhu, Zhen Ma, Jason C. Clark, Zhengwei Pan, Steven H. Overbury, Sheng Dai

Chemical Sciences Division

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

156 Scopus citations

Abstract

Many gold catalysts have been actively surveyed, but Au/SiO₂ catalysts that are highly active for CO oxidation still remain evasive. In this work, gold nanoparticles well dispersed on Cab-O-Sil fumed SiO₂ were prepared using Au(en)₂Cl₃ (en = ethylenediamine) as the precursor, and found to be very active for CO oxidation below 0 °C. The catalyst pretreatment via reduction and calcination, effect of gold loading, post-treatment in acidic and basic media, catalyst deactivation, storage, regeneration, and effect of surface modification by other metal oxides were explored. The results provide new perspective on the activation and promotion of active Au/SiO₂-based catalysts.

Original language	English
Pages (from-to)	89-99
Number of pages	11
Journal	Applied Catalysis A: General
Volume	326
Issue number	1
DOIs	https://doi.org/10.1016/j.apcata.2007.04.004
State	Published - Jun 30 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, Z. Ma, and J.C. Clark to the ORNL Research Associates Program, administered jointly by ORNL and the Oak Ridge Associated Universities.

Keywords

Au(en)Cl
CO oxidation
Gold catalysis
Nanoparticles
Silica

Access to Document

10.1016/j.apcata.2007.04.004

Cite this

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title = "Low-temperature CO oxidation on Au/fumed SiO2-based catalysts prepared from Au(en)2Cl3 precursor",

abstract = "Many gold catalysts have been actively surveyed, but Au/SiO2 catalysts that are highly active for CO oxidation still remain evasive. In this work, gold nanoparticles well dispersed on Cab-O-Sil fumed SiO2 were prepared using Au(en)2Cl3 (en = ethylenediamine) as the precursor, and found to be very active for CO oxidation below 0 °C. The catalyst pretreatment via reduction and calcination, effect of gold loading, post-treatment in acidic and basic media, catalyst deactivation, storage, regeneration, and effect of surface modification by other metal oxides were explored. The results provide new perspective on the activation and promotion of active Au/SiO2-based catalysts.",

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AU - Dai, Sheng

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