Hydrogen and Oxygen Evolution Photocatalysts Synthesized from Strontium Titanate by Controlled Doping and Their Performance in Two-Step Overall Water Splitting under Visible Light

Hydrogen and Oxygen Evolution Photocatalysts Synthesized from Strontium Titanate by Controlled Doping and Their Performance in Two-Step Overall Water Splitting under Visible Light

A visible-light-induced two-step overall water splitting was achieved by combining two types of photocatalysts prepared by introducing foreign elements into the identical mother structure with a controlled electronic band structure. Strontium titanate (SrTiO3) was selected as the mother structure an...

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Bibliographic Details
Published in:Journal of physical chemistry. C Vol. 116; no. 33; pp. 17458 - 17463
Main Authors: Hara, Shoichi, Yoshimizu, Masaharu, Tanigawa, Satoshi, Ni, Lei, Ohtani, Bunsho, Irie, Hiroshi
Format: Journal Article
Language:English
Published: Columbus, OH American Chemical Society 23-08-2012
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Band structure
Electronic structure
Iodides
Sodium
Photocatalysis
Visible radiation
Photoinduced effect
Titanates
Catalyst
Indium addition
Vanadium addition
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Summary:A visible-light-induced two-step overall water splitting was achieved by combining two types of photocatalysts prepared by introducing foreign elements into the identical mother structure with a controlled electronic band structure. Strontium titanate (SrTiO3) was selected as the mother structure and was doped with either vanadium (and sodium) or rhodium to introduce visible light sensitivity. By utilizing these two types of SrTiO3-based photocatalysts, simultaneous liberation of hydrogen (H2) and oxygen (O2) with a molar ratio of ∼2:1 was achieved in the presence of iodate ion (IO3 –)/iodide ion (I–) as a redox mediator under irradiation with only visible light (>420 nm).
ISSN:1932-7447
1932-7455
DOI:10.1021/jp306315r