On the formation of O2 ion on calcium oxide

Yoshio Ono, Hiroyuki Takagiwa, Shun Ichi Fukuzumi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Hyperoxide ion (O2) is formed when calcium oxide prepared from CaCO3 is exposed to oxygen at room temperature. The use of 17O2 revealed that the two oxygen atoms bear the equal spin density, indicating the side-on type adsorption of O2 ion. The conditions for O2 ion formation have been specified.

Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalZeitschrift fur Physikalische Chemie
Issue number1
StatePublished - 1979


  • Calcium oxide
  • ESR
  • Hyperoxide ion


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