The Role of Au-Support Interactions in Creation of Catalytic Performance of Au/Ce_(0.75)Zr_(0.25)O_2 in CO Oxidation

摘要

The aim of this work was to obtain more detailed insight into the role of Au-support interactions in the creation of catalytic performance of Au/Ce_(0.75)Zr_(0.25)O_2 in CO oxidation. The Ce_(0.75)Zr_(0.25)O_2 oxide and Au/Ce_(0.75)Zr_(0.25)O_2 catalysts were synthesized, characterized by BET, XRD, HRTEM, AAS, TPR-H_2, and tested in CO oxidation. An approximate evaluation of H_2 consumption for the surface reduction of the studied samples was estimated, applying the model developed by Johnson and Mooi, based on the qualitative relationship between the magnitude of the capping oxygen and BET surface area.