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Citation: CHEN Qufei, PAN Xiqiang, ZHAO Zhenbo, YANG Xiangguang. Effect of Synthetic Method on Thermal Stability and Oxygen Storage Capacity of Ce-Zr-Al Nanocomposite[J]. Chinese Journal of Applied Chemistry, ;2012, 29(11): 1297-1301. doi: 10.3724/SP.J.1095.2012.20001 shu

Effect of Synthetic Method on Thermal Stability and Oxygen Storage Capacity of Ce-Zr-Al Nanocomposite

1.
a School of Chemistry and Life Science, Changchun University of Technology, Changchun 130022, China;
2.
b Laboratory of Green Chemistry and Process, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Corresponding author: YANG Xiangguang,
Received Date: 4 January 2012
Available Online: 14 February 2012
Fund Project: 国家高技术研究发展计划(863计划,2011AA03A406) (863计划,2011AA03A406)

CeO₂-ZrO₂ solid solution is an indispensable oxygen storage material for the three way catalyst to control the pollution gas emission from automobiles.In this paper,three series of Ce-Zr-Al nanocomposite(ACZ) was prepared by citrate acid sol-gel method,sol assistant co-precipitation and sol co-precipitation,respectively.The obtained samples were calcinated at 1000℃ for 4 h to test the thermal stability and oxygen storage capacity(OSC).The effect of synthetic methods on these properties was investigated by means of X-ray diffraction(XRD),Brunauer Emmett Teller(BET) specific surface area(SSA) and H₂ temperature-programmed reduction(H₂-TPR).The results revealed that the thermal stability and oxygen storage capacity of all the ACZ were improved compared to the pure CeO₂-ZrO₂ solid solution.The molar proportion of Al doped in ACZ is 5,10,5 for citrate acid sol-gel method,sol assistant co-precipitation and sol co-precipitation,respectively.ACZ prepared by citrate acid sol-gel method had the highest oxygen storage capacity(717.5 μmol/g-CeO₂),account for 49.3% of the theoretical maximum.
- Ce-Zr solid solution,
- nanocomposite,
- thermal stability,
- sol-gel method,
- oxygen storage capacity
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