Reactor Evaluation of Ceria-Zirconia as an Oxygen Storage Material for Automotive Catalysts

Oxygen Storage/Redox Capacity and Related Phenomena on Ceria-Based Catalysts

“…Similar results concerning the sensitivity of NO x conversion to aging were obtained by Permana et al [105] who showed, however, that the use of a wash-coat loaded with Ceo.75Zro.25O2 permitted to maintain a much better performance than with pure ceria. Many attempts have been made to improve OSC properties and catalytic activity in modern TW catalysts.…”

Phases in Ce0.5Zr0.5O2−x system

“…Ce-Zr-O system has attracted great attention in three-way catalyst for automobile exhaust gases [1,2]. Oxygen storage capacity (OSC) is the basis of three-way catalyst [3].…”

Redox Behavior of Surface-Modified CeO2−ZrO2 Catalysts by Chemical Filing Process

“…This splitting of the reduction process in the bulk into the three peaks is a characteristic of a CeO 2 −ZrO 2 solid solution prepared using an oxalate precursor, and it suggests the existence of three kinds of environments around oxygen atoms in the lattice. Although the peak temperature for the first peak was not largely altered by the chemical filing process, those of the second and the third peaks were lowered by more than 50 K. The correlation between low-temperature reduction peaks in the TPR profiles and three-way activity has been established for the CeO 2 -based catalysts. , The disappearance of low-temperature peaks in TPR spectra causes a significant deactivation of the catalysis. For example, the conversions of carbon monoxide and nitrogen monoxide at the stoichiometric A/F ratio decreased greatly together from ca.…”