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Ion-Exchangeable Oxides with Layered Perovskite Structures as Photocatalysts for Overall Water Splitting

Published online by Cambridge University Press:  10 February 2011

T. Takata ,
K. Shinohara ,
A. Tanaka ,
M. Hara ,
J. N. Kondo  and
K. Domen
T. Takata
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan, kdomen@res.titech.ac.jp
K. Shinohara
Affiliation:
Nikon Corp. 1–10–1 Asamizodai, Sagamihara 228, Japan
A. Tanaka
Affiliation:
Nikon Corp. 1–10–1 Asamizodai, Sagamihara 228, Japan
M. Hara
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan, kdomen@res.titech.ac.jp
J. N. Kondo
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan, kdomen@res.titech.ac.jp
K. Domen
Affiliation:
Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, Japan, kdomen@res.titech.ac.jp
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Abstract

A novel series of photocatalysts for an overall water splitting is reported. The catalysts have a layered perovskite type structure with a general formula of A2−xLa2Ti3−xNbxO10 (A = K, Rb, Cs; x = 0, 0.5, 1.0). The catalysts, except for the one with x=1.0, are spontaneously hydrated, and the band gap irradiation induced efficient evolution of H2 and O2 in a stoichiometric ratio from an aqueous alkaline solution when a proper amount of Ni loading was made. The reaction mechanism of water splitting on these catalysts is discussed on the bases of the structural study of the catalysts.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 454: Symposium S – Advanced Catalytic Materials–1996 , 1996 , 177
Copyright
Copyright © Materials Research Society 1997

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References

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