Preparation of Ce0.1+xTi0.5-xAl0.2 Y0.1La0.1O1.8 and its application in three-way catalyst

Kang Cai Wang, Zhi Min Liu, Jian Li Wang, Li Cai, Yao Qiang Chen, Mao Chu Gong*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Ce0.1+xTi0.5-xAl0.2 Y0.1La0.1O1.8 (0 ≤ x ≤ 0.4) mixed oxides were prepared by co-precipitation method and characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption (BET), oxygen storage capacity (OSC), H2-temperature programmed reduction (H2-TPR) and NH3-temperature programmed desorption (NH3-TPD). The results of XRD revealed that there was only one single cubic phase in Ce0.1+xTi0.5-xAl0.2 Y0.1La0.1O1.8 system when x value increased from 0.2 to 0.4. The results of XPS showed that the ratio of superficial Ce4+/Ce3+ is maximal when x is 0.2. With the increase of Ce/Ti ratio, OSC is increased to a maximum value, and then gradually decreased. When x value is 0.2, the OSC reaches to 660μmol/g, and the reduction temperature of Ce4+ is the lowest according to the H2-TPR test (616°C). In this paper, a series of Pt/Ce0.1+xTi0.5-xAl0.2 Y0.1La0.1O1.8 three-way catalysts were prepared and the catalytic activities of catalysts were investigated. The results revealed that Pt/Ce0.3Ti0.3Al0.2 Y0.1La0.1O1.8 exhibits excellent low-temperature catalytic activity. The light-off temperature of C3H8, CO and NO over Pt/Ce0.3Ti0.3Al0.2 Y0.1La0.1O1.8 is 236, 147 and 228°C, respectively.

Original languageEnglish
Pages (from-to)1625-1630
Number of pages6
JournalKao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities
Issue number8
StatePublished - Aug 2009
Externally publishedYes


  • CeTiAl YLaO
  • Molar ratio of Ce/Ti
  • Support material
  • Three-way catalyst


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