Abstract
Abstract CeO 2 -ZrO 2 solid solution was supported on Si-modified alumina (Ce-Zr-O/Si-Al 2 O 3 ) by the reverse microemulsion method. Its structure, thermal stability, and oxygen release capacity were studied by N 2 adsorption, XRD, TPR, Raman spectroscopy, and XPS. The crystalline phase of Ce-Zr-O on Si-Al 2 O 3 was the same as that of unsupported CeO 2 -ZrO 2 (Ce-Zr-O), but its thermal stability, oxygen re-lease capacity at low temperature, and total oxygen storage capacity were higher. As the support of a Pd catalyst for methane combustion, Ce-Zr-O/Si-Al 2 O 3 had better properties than Ce-Zr-O, Si-Al 2 O 3 , and the mixture of Ce-Zr-O + Si-Al 2 O 3 . Using the 0.2%Pd/10%Ce-Zr-O/Si-Al 2 O 3 catalyst, T 90 for methane combustion was only 345°C, which was 175°C lower than that of Pd supported on other supports.
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