合成方法对纳米Ce-Zr-Al高温稳定性及储氧性能的影响

应用化学, 2012, 29(11): 1297-1301. doi: 10.3724/SP.J.1095.2012.20001

合成方法对纳米Ce-Zr-Al高温稳定性及储氧性能的影响

陈去非 ^1, , 潘喜强 ^2, , 赵振波 ^3, , 杨向光 ^4,

1.长春工业大学化学与生命科学学院长春 130022;中国科学院长春应用化学研究所绿色化学与过程实验室长春 130022

2.中国科学院长春应用化学研究所绿色化学与过程实验室长春 130022

3.长春工业大学化学与生命科学学院长春 130022

4.中国科学院长春应用化学研究所绿色化学与过程实验室长春 130022

基金项目: 国家高技术研究发展计划(863计划,2011AA03A406)

关键词：铈锆固溶体 , 纳米复合体 , 热稳定性 , 溶胶凝胶法 , 储氧量

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

采用柠檬酸溶胶凝胶、溶胶辅助共沉淀和溶胶共沉淀3种方法合成了不同Al掺杂的纳米CexZr1-xO2与Al2O3的复合体Ce-Zr-Al.用XRD、BET和H2-TPR表征了纳米Ce-Zr-Al复合体的抗烧结性与储氧性能,与未掺杂的铈锆固溶体相比,Al掺杂的纳米铈锆复合体的抗烧结性与储氧性能均有显著改善,柠檬酸溶胶凝胶法的最佳掺杂量为5倍Al(Al与CexZr1-xO2摩尔比),溶胶辅助共沉淀法最佳掺杂量为10倍Al,溶胶共沉淀法最佳掺杂量为5倍Al,其中,柠檬酸溶胶凝胶法合成的Ce-Zr-Al纳米复合物储氧量最高,为717.5 μmol/g-CeO2,占理论储氧量(即储氧效率)的49.3％.

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