Preparation and Characterization of Cex Th1-xO2 Solid Solutions Prepared by Sol-Gel Method

Preparation and Characterization of Cex Th1-xO2 Solid Solutions Prepared by Sol-Gel Method

The Ce Th1-xO2 solid solutions were prepared by citrate sol-gel method, and their structure and reduction properties were studied. XRD shows that solid solution with cubic phase formed in all the solid solutions (x=0.2,0.5,0.8) Cex Th1-xO2. Raman spectrum shows that Ce-Th complex oxides can promote...

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Veröffentlicht in:Journal of rare earths 2005, Vol.23 (2), p.251-253
1. Verfasser: 赵雷洪 罗孟飞 刘广宇
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Sprache:eng
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催化化学
稀土元素
还原性
铈钍氧固态溶液
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description The Ce Th1-xO2 solid solutions were prepared by citrate sol-gel method, and their structure and reduction properties were studied. XRD shows that solid solution with cubic phase formed in all the solid solutions (x=0.2,0.5,0.8) Cex Th1-xO2. Raman spectrum shows that Ce-Th complex oxides can promote the formation of oxygen vacancies. Two reduction peaks appear in the TPR profiles of CexTh1-xO2 solid solution. The α peak is attributed to the reduction of Ce^4+ on the surface, and the β peak is attributed to the reduction of bulk CeO2. The incorporation of Th atom into CeO2 improves the reduction of CeO2. CexTh1-xO2 mixed oxides are promising materials for oxygen vacancies produced, as well as catalysts for many reactions involved oxygen, such as the catalysts for three-way reactions for reducing the releasing pollutants or combustion of VOCs.
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subjects 催化化学
稀土元素
还原性
铈钍氧固态溶液
title Preparation and Characterization of Cex Th1-xO2 Solid Solutions Prepared by Sol-Gel Method
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