アルミナ担持セリア触媒の酸素ストレージ能と複合粒子形態

抄録

Oxygen storage capacity (OSC) of ceria (CeO₂) is the important property of recent automotive exhaust catalysts. Alumina-supported ceria catalyst is useful for removal of carbon monoxide, hydrocarbons, and nitrogen oxides under dynamic condition. In this work, temperature programmed reduction and OSC of 10-50mol%v-Al₂O₃ catalysts were compared with their morphology. The OSC per CeO₂ decreases with the added amount of CeO₂ to Al₂O₃ because the crystallite size of ceria increased. The OSC per surface area of CeO₂ was enhanced by alumina support.