New tantalate photocatalysts for water decomposition into H2 and O2

Hideki Kato, Akihiko Kudo

Research output: Contribution to journalArticlepeer-review

391 Citations (Scopus)


Photocatalytic activities for the decomposition of distilled water into H2 and O2 were investigated on various tantalates. In the alkali and alkaline earth tantalates, LiTaO3, NaTaO3, KTaO3, MgTa2O6, and BaTa2O6 showed photocatalytic activities for water decomposition without co-catalysts. Among them, BaTa2O6 in the orthorhombic phase was the most active. The addition of a small amount of Ba(OH)2 into the water and supporting NiO drastically enhanced the photocatalytic reaction on the BaTa2O6 catalyst. On the other hand, in the transition metal tantalates, NiTa2O6 produced both H2 and O2 without co-catalysts.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalChemical Physics Letters
Issue number5-6
Publication statusPublished - 1998 Oct 23


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