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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.

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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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