Pd-based catalysts using high surface area SiC (50.8m
2
/g) modified by CeO2, ZrO2 and
Ce0.5Zr0.5O2 solid solution as the support could effectively increase the dispersion and activity of
active metallic phases. XRD and XPS studies showed that Zr4+ could be incorporated into the
CeO2 lattice to form Zr0.5Ce0.5O2 solid solution. T10% and T100% of Pd/Zr0.5Ce0.5O2/SiC are 240oC
and 340oC respectively and the reaction could be finished in a narrow temperature range (around
100oC) certainly due to the excellent oxygen storage capacity, redox properties, thermal stability
and low temperature catalytic activity of Ce0.5Zr0.5O2 solid solution. However, Pd/CeO2/SiC and
Pd/ZrO2/SiC have lower catalytic activity than Pd/Zr0.5Ce0.5O2/SiC. All the SiC-based catalysts
can keep the methane conversion of almost 100 % after 10 reaction cycles suggesting that active
nanoparticles are well stabilized on the SiC surface while the promoters serve as oxygen reservoir
and retain good redox propertie