Oxygen Storage and Release in TWC

CeCb — Ce02, i x) + v02 under the oxygen excess atmosphere, and 

Complex oxides of ceria were formed by pyrolysis of mixed precipitation from aqueous solution. Table I shows the XRD results of Ce La and Ce Zr mixed oxides calcined at 1,000°C (Matsumoto et al., 1991). These results 

Phases Formed in Ce02-La203 and Ce02-Zr02 Systems (Measured by XRD) 

Note s.s., solid solution with La or Zr oxide Cl and C2, cubic fluorite-type oxide. 

CO oxidation activity of (Ceo.g.Lao.OOpgs and (Ce0.8,Zr0.2)O2 heated at 1,000°C are shown in Fig. 8. The activity of Ce02 is extremely improved by the addition of La and Zr into Ce02. The reaction kinetics is controlled by the diffusion of lattice oxygen and is described by the following equation  

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