Low-Temperature CO oxidation on Au/fumed SiO₂-based catalysts prepared from Au(en)₂C₁₃

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Applied Catalysis A

DOI:https://doi.org/10.1016/j.apcata.2007.04.004· OSTI ID:931766

Zhu, Haoguo ^[1]; Ma, Zhen ^[1]; Clark, Jason C ^[1]; Pan, Zhengwei ^[1]; Dai, Sheng ^[1]

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1. ORNL

Many gold catalysts have been actively surveyed, but Au/SiO{sub 2} catalysts that are highly active for CO oxidation still remain evasive. In this work, gold nanoparticles well dispersed on Cab-O-Sil fumed SiO{sub 2} were prepared using Au(en){sub 2}Cl{sub 3} (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/SiO{sub 2}-based catalysts.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 931766
• Journal Information: Applied Catalysis A, Vol. 326, Issue 1
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON MONOXIDE
OXIDATION
CATALYTIC EFFECTS
GOLD
CATALYST SUPPORTS
SILICON OXIDES
CHEMICAL PREPARATION
CATALYSTS
PRECURSOR
GOLD CHLORIDES
CALCINATION
DEACTIVATION
REGENERATION