Sulfated Zirconia Catalysts. The Crystal Phases and Their Transformations

Ram Srinivasan, Thomas R. Watkins, Camden R. Hubbard, Burtron H. Davis

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

The phase transformations of zirconia are an important factor that makes it a valuable material for numerous applications in ceramics. The factors triggering the onset of the phase transformation are controversial. Evidence is presented to show that surface sites that adsorb oxygen at low temperatures (298-500 K) are responsible for causing the tetragonal → monoclinic transformation at low temperatures. The incorporation of sulfate covers these sites and inhibits the tetragonal → monoclinic transformation.

Original languageEnglish
Pages (from-to)725-730
Number of pages6
JournalChemistry of Materials
Volume7
Issue number4
DOIs
StatePublished - Apr 1995
Externally publishedYes

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