Abstract
TAP (temporal analysis of products) technique was used to clarify the controversial mechanism for low-temperature CO oxidation on supported Au catalysts involving unidentified moisture effects on the performances. The unique TAP transient technique, along the use of a specially prepared, highly active Au/Ti(OH) 4 * catalyst, provided the information and characterization of each elementary step involving weak and reversible CO adsorption, strong and molecular O2 adsorption, and their surface reaction, which are suppressed by the coexistence of water vapor.
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