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Role Of Vapor Phase Processes On The Sintering Of Diesel Oxidation Catalysts, Cristhian Carrillo

Nanoscience and Microsystems ETDs

This work provides a fundamental understanding on the vapor phase processes that govern the sintering of supported nanoparticles in relation to the diesel oxidation catalyst (DOC). Sintering is a deactivation process that affects this catalyst significantly, and many other catalyst systems. Therefore, it is important to understand the sintering mechanisms in order to improve the long term catalytic reactivity.

Pt is an active catalyst in the DOC but it sinters via Ostwald ripening to form large particles under the accelerated aging conditions (800 ^oC) recommended by the Department of Energy (DOE). At 800 ^oC in the presence of …