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Citation: Pang Xiu-Jiang, ng Mao-Chu, Wang Min, Ren Yi-Gang, Zhao Ming, Chen Yao-Qiang. Effect of Precipitation Method on Properties of Oxygen Storage Materials CeO₂-ZrO₂[J]. Acta Physico-Chimica Sinica, ;2004, 20(09): 1155-1158. doi: 10.3866/PKU.WHXB20040919 shu

Effect of Precipitation Method on Properties of Oxygen Storage Materials CeO₂-ZrO₂

1.
Department of Chemistry, Sichuan University, Chengdu　610064

Received Date: 15 December 2003
Available Online: 15 September 2004

In order to study the influence of oxygen storage materials′ preparation methods on their properties of oxygen storage capacity (OSC), surface area and reductive property, rare earth oxygen storage materials were prepared by different precipitation methods. Physical-chemical methods such as BET, XRD, H2-TPR and so on were used to study properties of these oxygen storage materials. Results indicated that solid solution could be t whichever method was used. But the properties of samples are sensitive to the preparation methods. When CeO2-ZrO2 was prepared by adding cerium and zirconium nitrate solution and ammonia solution simultaneously, the sample obtained had od OSC and high surface area. When CeO2-ZrO2 was prepared by adding the ammonia solution into the above nitrate solution, the sample obtained had poor but stable OSC and low surface area. When CeO2-ZrO2 was prepared by adding the above nitrate solution into the ammonia solution, the sample obtained had od OSC and low surface area. We also find that the OSC of materials prepared has no dependence on surface area but the reductivity of the materials depends on the surface area.
- Oxygen storage material;Precipitation method;Structure and properties
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Effect of Precipitation Method on Properties of Oxygen Storage Materials CeO2-ZrO2

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通讯作者: 陈斌, bchen63@163.com

Effect of Precipitation Method on Properties of Oxygen Storage Materials CeO₂-ZrO₂