La{sup 3+} modified Al{sub 2}O{sub 3} as a support for CeO{sub 2}
Conference
·
OSTI ID:142009
- Ford Motor Co., Dearborn, MI (United States)
X-ray photoelectron spectroscopy measurements indicate that the Ce{sup 3+} like fraction in {gamma}-Al{sub 2}O{sub 3} supported CeO{sub 2} can be decreased by the incorporation of La{sup 3+}. If La{sup 3+} is incorporated into the {gamma}-Al{sub 2}O{sub 3} before CeO{sub 2} is added, a higher CeO{sub 2} dispersion and a greater range of reversible reducibility of the CeO{sub 2} may also be obtained. These changes offer potential for improvement in the oxygen storage capacity provided by CeO{sub 2} in three-way catalysts. The actual effect of La{sup 3+} incorporation on the activity and durability of a Pt catalyst is assessed by a combination of temperature programmed reduction and flow reactor measurements.
- OSTI ID:
- 142009
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
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