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Bimetallic Supported Pd-Ag Catalysts

Series of Pd-Ag/SiO2, Pd/CeO2 and Pd-Ag/CeO2 catalysts with different Pd/Ag ration were synthesized and investigated. It was shown that simultaneous reduction of Pd and Ag took place for Pd-Ag/SiO2 and Pd Ag/CeO2 catalysts during TPR-H2. That may be associated with formation of bimetallic Pd-Ag particles. The high temperature of Pd reduction was observed for Pd/CeO2 and Pd-Ag/CeO2 catalysts. That was associated with strong interaction of PdO with CeO2 or formation of mixed PdxCeO2-δ phase.