Oxygen Storage Capacity and Adsorptive Property of Praseodymium Oxides
来源期刊：JOURNAL OF RARE EARTHS2003年第6期
论文作者：方明 万颖 刘毅廷 马建新
Key words：catalitic chemistry; praseodymium oxides; oxygen storage capacity; TPD-TPR; autocatalyst; rare earths;
Abstract: Oxygen storage and adsorptive properties of praseodymium oxides were investigated by pulse experiments and temperature-programmed desportion/reduction (TPD/TPR) experiments. Pr2O3 possesses the similar oxygen storage properties to CeO 2, and its dynamic oxygen storage capacity is 14.9 μmolg-1. The studies on TPD of O2, H2O and CO and TPR show that Pr2O3 provides more active sur face oxygen species and at a lower temperature than CeO2. It is suggested that Pr2O3 can be a well candidate as an oxygen storage component in automobile three-way catalyst.
方明1，万颖2，刘毅廷1，马建新3
(1.Institute for Environment and Sustainable Development, Hong Kong University of Science and Technology, Hong Kong, China;
2.Department of Chemistry, Shanghai Normal University, Shanghai 200234, China;
3.Clean Energy Automotive Engineering Center, Tongji University, Shanghai 200092, China)
Abstract:Oxygen storage and adsorptive properties of praseodymium oxides were investigated by pulse experiments and temperature-programmed desportion/reduction (TPD/TPR) experiments. Pr2O3 possesses the similar oxygen storage properties to CeO 2, and its dynamic oxygen storage capacity is 14.9 μmolg-1. The studies on TPD of O2, H2O and CO and TPR show that Pr2O3 provides more active sur face oxygen species and at a lower temperature than CeO2. It is suggested that Pr2O3 can be a well candidate as an oxygen storage component in automobile three-way catalyst.
Key words:catalitic chemistry; praseodymium oxides; oxygen storage capacity; TPD-TPR; autocatalyst; rare earths;
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