Promoting Platinum Metals by Ceria

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Abstract
Modern autocatalysts are complex, multi-component systems which, when combined with vehicle fuel calibration systems, are able to provide the activity, selectivity and durability required to meet the exacting emissions standards now demanded. In addition to the platinum group metals, one of the major components in current three-way catalysts is ceria, whose main role was originally thought to involve oxygen storage under transient conditions. In practice, the situation is more complex, with ceria contributing to a number of catalytic functions and also interacting with the active platinum group metals.

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