Defective structure, oxygen mobility, oxygen storage capacity, and redox properties of RE-based (RE = Ce, Pr) solid solutions

H. He*, H. X. Dai, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

212 Citations (Scopus)

Abstract

Defective structures, surface textures, oxygen mobility, oxygen storage capacity (OSC), and redox properties of RE0.6Zr0.4O 2 and of RE0.6Zr0.4-xYxO2 (RE=Ce, Pr; x=0, 0.05) solid solutions have been investigated using X-ray diffraction (XRD), temperature-programmed desorption (TPD), temperature- programmed reduction (TPR), O2-H2 and O2-CO titration, 18O/16O isotope exchange, CO pulsing reaction, and X-ray photoelectron spectroscopy (XPS) techniques. The effects of doping noble metal onto RE0.6Zr0.4-xYxO2 on oxygen mobility and surface oxygen activities have also been studied. Based on the experimental outcomes, we conclude that: (i) a Pr-based solid solution has better redox behavior than a Ce-based one; (ii) incorporation of yttrium ions in the lattices of CZ and PZ solid solutions could result in an enhancement in oxygen vacancy concentration, Ce4+/Ce3+ and Pr 4+/Pr3+ redox properties, lattice oxygen mobility, and oxygen storage capacity; and (iii) doping the noble metal (Rh, Pt, and Pd) onto RE-based solid solution has positive effect on the properties concerned in this work.

Original languageEnglish
Pages (from-to)245-254
Number of pages10
JournalCatalysis Today
Volume90
Issue number3-4
DOIs
Publication statusPublished - 1 Jul 2004
EventEnvironmental Catalysis and Eco-Materials - Beijing, China
Duration: 7 Oct 20037 Oct 2003

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)

User-Defined Keywords

  • O/ O isotope exchange
  • CeO-ZrO
  • Lattice oxygen mobility
  • Oxygen storage capacity
  • PrO-ZrO
  • Redox property

Fingerprint

Dive into the research topics of 'Defective structure, oxygen mobility, oxygen storage capacity, and redox properties of RE-based (RE = Ce, Pr) solid solutions'. Together they form a unique fingerprint.

Cite this