The influence of water on the reduction and reoxidation of ceria

Celestino Padeste*, Noel W. Cant, David L. Trimm

*Corresponding author for this work

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

Two different samples of ceria have been characterized by temperature programmed reduction in carbon monoxide (CO-TPR), surface area determination and transmission electron microscopy (TEM). The much higher reducibility at temperatures below 550 °C of a sample prepared by decomposition of cerium carbonate, compared to a commercial ceria, was attributed to the much lower crystallinity. When this ceria, in the partly reduced state, was brought in contact with water vapour, it was readily reoxidised with evolution of hydrogen. The oxygen storage capacity of this sample, determined in cycling experiments, was considerably lowered by the presence of water.

Original languageEnglish
Pages (from-to)305-316
Number of pages12
JournalCatalysis Letters
Volume18
Issue number3
DOIs
Publication statusPublished - Sep 1993

Keywords

  • Ceria reduction
  • CO-TPR
  • oxygen storage capacity
  • TEM
  • XPS

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