Oxygen storage capacity of noble metal car exhaust catalysts containing nickel and cerium

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90322-9· OSTI ID:7250583

Loeoef, P; Kasemo, B; Keck, K E ^[1]

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1. Chalmers Univ. of Technology, Goeteborg (Sweden)

Oxygen storage capacity as a function of temperature was measured for two different monolithic car exhaust catalysts. Mass spectrometry connected on-line to a flow reactor was used for quantification of oxygen uptake and reduction, respectively. Both catalysts contained Pt, Rh, and Ce supported by Al{sub 2}O{sub 3}. One of the catalysts also contained Ni. The amount of oxygen that can be taken up/reduced away is strongly temperature-dependent in the range investigated (300-900 K). When present, Ni dominates the oxygen storage capacity at high temperatures. In the catalyst lacking Ni, Ce dominates the storage capacity at high temperatures. At lower temperatures chemisorbed oxygen on Pt/Rh seems to play an essential role.

• OSTI ID: 7250583
• Journal Information: Journal of Catalysis; (USA), Vol. 118:2; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
CATALYSTS
SORPTIVE PROPERTIES
CATALYTIC CONVERTERS
CERIUM
NICKEL
OXYGEN
CHEMISORPTION
PLATINUM
RHODIUM
AIR POLLUTION CONTROL
ALUMINIUM OXIDES
CAPACITY
CARBON MONOXIDE
CATALYST SUPPORTS
HIGH TEMPERATURE
HYDROCARBONS
NITROGEN OXIDES
REDUCTION
STORAGE
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
ELEMENTS
EQUIPMENT
METALS
NITROGEN COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RARE EARTHS
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
TRANSITION ELEMENTS
330701* - Emission Control- Nitrogen Oxides
330702 - Emission Control- Carbon Monoxide
330704 - Emission Control- Hydrocarbons