Quaternary Oxide of Cerium, Terbium, Praseodymium and Zirconium for Three-Way Catalysts

摘要

Oxygen storage capacity (OSC) , oxygen buffer capacity (OBC), X-ray diffraction and electron diffraction pattern, high resolution electron microscopy were used to study the quaternary oxides, i.e. , of Ce, Tb, Pr and Zr. (Ce_(.6) Tb_(0.2)Zr_(0.2)O_(2-delta) and Ce_(.6)Pr_(0.2)Zr_(0.2)O_(2-delta)) . OSC and OBC data indicate that these oxides have very good oxygen transfer capacity (OTC) and their pseudo-solid solutions exhibit fluorite-type structure. These oxides may act as a good candidate for three-way catalysts (TWC) .