摘要
XRD was used to Characterize the system of alumina supported ZrO2 in atemperature range of 500-1000℃. It was found that ZrO2 in ZrO2-Al2O3 sample was noncrystalline below 600℃, cubic-ZrO2 over a temperature range of 600-900℃,and t-ZrO2at temperature higher than 900℃. The pore structure, CO oxidation activity and sufaceoxygen properties of out-layer ZrO2 were also studied. The results indicated that smallout-layer ZrO2 made a contribution to pore structure of alumina base in a pore size rangeof 10-50A, and not only was CO oxidation activity of ZrO2-Al2O3 samples related to itsphase structure, but also to properties of its surface oxygen desorption and lattice oxygendefect.
XRD was used to Characterize the system of alumina supported ZrO2 in atemperature range of 500-1000℃. It was found that ZrO2 in ZrO2-Al2O3 sample was noncrystalline below 600℃, cubic-ZrO2 over a temperature range of 600-900℃,and t-ZrO2at temperature higher than 900℃. The pore structure, CO oxidation activity and sufaceoxygen properties of out-layer ZrO2 were also studied. The results indicated that smallout-layer ZrO2 made a contribution to pore structure of alumina base in a pore size rangeof 10-50A, and not only was CO oxidation activity of ZrO2-Al2O3 samples related to itsphase structure, but also to properties of its surface oxygen desorption and lattice oxygendefect.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1995年第12期1097-1100,共4页
Acta Physico-Chimica Sinica
基金
浙江省科委基金
