Abstract:The Pd/Al2O3 close-coupled catalysts supported on modified alumina were prepared by an impregnation method, and then characterized by H2-temperature programmed reduction (H2-TPR), CO chemisorption, and X-ray photoelectron spectroscopy (XPS). Both total catalytic activity and single reactions in related to C3H8 conversion were tested in simulated exhaust gas. The results show that the amount of active PdOx decreases and negative metallic Pd 0 appears during aging treatment. The light-off temperature (T50) and c… Show more
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