Temperature Programmed Reduction Studies on CeO2-Containing Catalysts
来源期刊：JOURNAL OF RARE EARTHS2004年第1期
论文作者：Takanori Mizushima Harunobu Ohkita Noriyoshi Kakuta
Key words：catalytic chemistry; cerium oxide; oxygen storage; TPR; rare earths;
Abstract: Temperature programmed reduction (TPR) study was carried out for CeO2/Al2O3 and CeO2/ZrO2 catalysts to evaluate oxygen storage property induced by a facile redox cycling of Ce ion. The CeO2/ZrO2 catalyst possesses excellent oxygen storage activity at 373 K after reduction above 1173 K although the oxygen storage of CeO2/Al2O3 catalyst after reduction above 1173 K is poor because of the formation of CeAlO3. Consequently, the oxygen storage on the CeO2/ZrO2 catalyst smoothly occurs from low temperatures when the catalyst is reduced even at high temperatures.
Takanori Mizushima1，Harunobu Ohkita1，Noriyoshi Kakuta1
(1.Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempakucho, Toyohashi 441-8580, Japan)
Abstract:Temperature programmed reduction (TPR) study was carried out for CeO2/Al2O3 and CeO2/ZrO2 catalysts to evaluate oxygen storage property induced by a facile redox cycling of Ce ion. The CeO2/ZrO2 catalyst possesses excellent oxygen storage activity at 373 K after reduction above 1173 K although the oxygen storage of CeO2/Al2O3 catalyst after reduction above 1173 K is poor because of the formation of CeAlO3. Consequently, the oxygen storage on the CeO2/ZrO2 catalyst smoothly occurs from low temperatures when the catalyst is reduced even at high temperatures.
Key words:catalytic chemistry; cerium oxide; oxygen storage; TPR; rare earths;
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