Unusual activation of novel Au/TiO2/AI2O3 xH2O catalysts by calcination

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Catalysis Letters

DOI:https://doi.org/10.1007/s10562-007-9369-1· OSTI ID:930985

Yan, Wenfu ^[1]; Ma, Zhen ^[1]; Mahurin, Shannon Mark ^[1]; Dai, Sheng ^[1]

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1. ORNL

Au/Al{sub 2}O{sub 3} {center_dot} xH{sub 2}O and Au/TiO{sub 2}/Al{sub 2}O{sub 3} {center_dot} xH{sub 2}O (x = 0-3) catalysts were prepared by assembling gold nanoparticles on neat and TiO{sub 2}-modified Al{sub 2}O{sub 3}, AlOOH, and Al(OH){sub 3} supports, and their catalytic activity in CO oxidation was tested either as synthesized or after on-line pretreatment in O{sub 2}-He at 500 C. A promotional effect of TiO{sub 2} on the activity of gold catalysts was observed upon 500 C-pretreatment. The catalyst stability as a function of time on stream was tested in the absence or presence of H{sub 2}, and physiochemical characterization applying BET, ICP-OES, XRD, TEM, and {sup 27}Al MAS NMR was conducted.

• 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: 930985
• Journal Information: Catalysis Letters, Vol. 121, Issue 3-4; ISSN 1011-372X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCINATION
CATALYSTS
GOLD
CATALYST SUPPORTS
TITANIUM OXIDES
ALUMINIUM OXIDES
HYDRATES
CATALYTIC EFFECTS
CARBON MONOXIDE
OXIDATION