A pronounced catalytic activity of La-Cu oxide supported on ZrO sub 2 for reaction between nitrogen monoxide and carbon monoxide
- Univ. of Tokyo (Japan)
The reductions of nitrogen monoxide (NO) by carbon monoxide (CO) and hydrocarbon are the fundamental reaction pathways for the removal of NO{sub x} from automobile exhaust. Therefore, it is meaningful from the standpoint of basic research to develop and investigate a high-activity catalyst for the reduction of NO by CO, although for the actual exhaust the effects of H{sub 2}O and SO{sub 2} cannot be ignored. It has been reported that copper-containing mixed oxides having perovskite related structures such as Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y}, YBa{sub 2}Cu{sub 3}O{sub y{prime}}, and La{sub 2}CuO{sub 4}show high catalytic activities for the reaction between NO and CO and that the catalysts having the valence of copper ion close to two are active for the reaction. The authors have reported that the perovskite-type mixed oxide, LaCoO{sub 3}, can be highly dispersed on ZrO{sub 2} and gave an enhanced catalytic activity. ZrO{sub 2} is also known as a suitable substrate for preparing copper-containing superconducting oxide films. They attempted in this study to prepare La{sub 2}CuO{sub 4} highly dispersed on the surface of ZrO{sub 2} and obtained a very high catalytic activity for the reaction between NO and CO.
- OSTI ID:
- 7160248
- Journal Information:
- Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Journal Issue: 2 Vol. 132:2; ISSN 0021-9517; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330701 -- Emission Control-- Nitrogen Oxides
330702 -- Emission Control-- Carbon Monoxide
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CALCINATION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CONVERTERS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COHERENT SCATTERING
CONTROL
COPPER COMPOUNDS
COPPER OXIDES
DECOMPOSITION
DIFFRACTION
EQUIPMENT
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PYROLYSIS
RARE EARTH COMPOUNDS
REDUCTION
SCATTERING
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES