Applications of supported gold catalysts in environmental problems

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:142020

Tsubota, Susumu; Udea, Atsushi; Sakurai, Hiroaki; Kobayashi, Tetsuhiko; Haruta, Masatake ^[1]

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1. Government Industrial Research Institute of Osaka, Ikeda (Japan)

Small gold particles deposited on metal oxides exhibit extraordinarly high catalytic activities. For example, Au/{alpha}-Fe{sub 2}O{sub 3} can catalyze the oxidation of CO at a temperature as low as {minus}70{degrees}C. The reaction is not retarded by accelerated by moisture contained in reaction gases. These unique properties of supported gold catalysts show a potential of their applications in a variety of environmental problems. It has been found that the catalytic nature of supported gold depends on the kind of metal oxide supports. Some examples of the suitable supports are: NiFe{sub 2}O{sub 4} for NO{sub x} reduction by CO and the oxidation-decomposition of trimethylamine; Co{sub 3}O{sub 4} for the complete oxidation of CH{sub 4} and C{sub 3}H{sub 8}; ZnO and TiO{sub 2} for CO{sub 2} hydrogenation. It appears that the interfacial perimeter between gold particles and metal oxide support and the size of gold particles play the most important role in determining the catalytic nature and the activity.

• OSTI ID: 142020
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
CATALYST SUPPORTS
CATALYTIC EFFECTS
GOLD
POLLUTION CONTROL