2003•Acta Scientiarum Naturalium Universitatis SunyatseniRequires access

Oxygen Storage Opacity and Adsorptive Property of Praseodymium Oxides

万颖, 马建新, 方明, 刘毅廷

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 CeO2, and its dynamic oxygen storage capacity is 14.9μmol·g^-1. The studies on TPD of O2, H2O and CO and TPR show that Pr2O3 provides more active surface 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.

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Key concepts: Praseodymium, Oxygen storage, Oxygen, Chemistry, Catalysis, Partial pressure, Opacity, Materials science