Mechano-catalytic overall water splitting on some mixed oxides

Go Hitoki, Tsuyosi Takata, Shigeru Ikeda, Michikazu Hara, Junko N. Kondo, Masato Kakihana, Kazunari Domen

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


Simple transition metal oxides such as NiO, Co3O4, Fe3O4 and Cu2O were found to catalytically decompose water into H2 and O2 by mechanical energy. The reaction is regarded as `mechano-catalytic' overall water splitting' and is a quite novel catalytic reaction. In this paper, some general aspects on the mechano-catalytic overall water splitting are reviewed on simple oxides. In addition, recent results on the mechano-catalytic activity of a groups of mixed oxides, wolramite-type oxides with a formula of ABO4 (A = Fe, Co, Ni and Cu, etc., B = W, Mo), are shown. AWO4 (A = Fe, Co, Ni and Cu) decomposed water into H2 and O2 under the supply of mechanical energy, indicating that mechano-catalytic overall water splitting proceeded on wolframite-type compounds containing 3d-transition metals. AMoO4 (A = Fe, Co, Ni) also decomposed water into H2 and O2 under supply of mechanical energy. The reaction properties on wolframite-type oxides are discussed.

Original languageEnglish
Pages (from-to)175-181
Number of pages7
JournalCatalysis Today
Issue number2-4
Publication statusPublished - 2000 Dec 25
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)


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