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LnO2-δ-ZrO2(Ln=Ce，Tb，Pr)储氧材料的制备与结构 被引量：4

Synthesis and Structure of Oxygen Storage Materials LnO_(2-δ)-ZrO_2(Ln=Ce,Tb,Pr)
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摘要 迄今为止,国际普遍使用的储氧材料主要是以具萤石四方结构CeO2-δ-ZrO2为基体掺杂Y2O3的固溶氧化物。为进一步提高储氧材料的储氧、催化、高温稳定性和抗老化性能,本研究采用"超声膜扩散"法制备了(LnO2-δ)x-(ZrO2)1-x(Ln=Ce,Pr,Tb)储氧材料。通过热重(TG)、微分扫描热分析(DSC)和XRD对其固溶过程和结构特征进行了研究。结果表明,(PrO2-δ)x-(ZrO2)1-x和(TbO2-δ)x-(ZrO2)1-x显示出具有(CeO2-δ)x-(ZrO2)1-x同样晶体结构,较后者更稳定的固溶体组织,为进行储氧催化等性能的研究提供了基础。 Fluorite- type structured CeO2-δ - ZrO2 solid solutions doped with Y2O3 have been as far used as the world - wide principal oxygen storage materials （OSM） in the three way catalysis （TWC）. To improve the oxygen storage capacity, catalytic activity and thermal stability, OSM （LnO2-δ）x - （ZrO2）1-x （ Ln = Ce, Pr, Tb） were synthesized using a novel method ＂ultrasound - assisted osmosis - diffusion chemical synthesis＂. The solid solution process and crystallization of the OSM were analyzed by thermal gravimetry （TG） ,differential scanning calorimetry （DSC） and XRD. The OSM （PrO2-δ）x - （ZrO2）1-x and （TbO2-δ）x - （ZrO2）1-x have been identified as solid solutions more stable than CeO2-δ - ZrO2 and all of them have the fluorite - type crystal structure.
作者 梁婕 郑君海 赵文广 何洪 张建旗 安胜利
机构地区 内蒙古科技大学材料与冶金学院 北京工业大学环境与能源工程学院
出处 《稀土》 EI CAS CSCD 北大核心 2009年第3期15-18,共4页 Chinese Rare Earths
基金 国家自然科学基金项目资助(50642034 50564002)
关键词 PrO2-δ-ZrO2 TbO2-δ-ZrO2 储氧材料 三元催化 尾气净化 PrO2 -δ - ZrO2 TbO2-δ - ZrO2 oxygen storage materials three way catalysts automobile exhaust purification
分类号 TQ426.8 [化学工程] O614.33 [理学—无机化学]
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参考文献16

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共引文献22

同被引文献31

  • 1周新木,徐招弟,李永绣,辜子英,胡平贵,彭德院.铈锆固溶体的水热晶化及抛光性能[J].南昌大学学报（理科版）,2006,30(2):162-165. 被引量：2
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  • 10张馥鼎,马新胜,高玮.纳米稀土—锆固溶体的合成及高温稳定性研究[J].稀土,2007,28(4):19-24. 被引量：2

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二级引证文献16

稀土
2009年 第3期

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