Photocatalytic <mml:math id="E1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>H</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> or <mml:math id="E2" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mtext>O</mml:mtext><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math> Evolution over A-Site Deficient Perovskite-Type Compounds <mml:math id="E3" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mtext>La</mml:mtext><mml:mrow><mml:mtext>1</mml:mtext><mml:mtext>/</mml:mtext><mml:mtext>3</mml:mtext></mml:mrow></mml:msub><mml:msub><mml:mtext>MO</mml:mtext><mml:mn>3</mml:mn></mml:msub></mml:math> (M = Nb, Ta) from Aqueous Solutions

Li, Dunfang; Zheng, Jing; Li, Zhaosheng; Fan, Xiaoxing; Liu, Lifei; Zou, Zhigang

doi:https://doi.org/10.1155/2007/21860

International Journal of Photoenergy

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Research Article | Open Access

Volume 2007 | Article ID 021860 | https://doi.org/10.1155/2007/21860

Photocatalytic H2 or O2 Evolution over A-Site Deficient Perovskite-Type Compounds La1/3MO3 (M = Nb, Ta) from Aqueous Solutions

Dunfang Li,^1,2Jing Zheng,^1,2Zhaosheng Li,^1,2Xiaoxing Fan,^1,2Lifei Liu,^1,2and Zhigang Zou^1,2

Academic Editor: Jacek Miller

Received19 Apr 2007

Accepted25 Oct 2007

Published28 Nov 2007

Abstract

Two compounds La1/3MO3 (M = Nb, Ta) with A-site deficient perovskite-type structure were synthesized by the solid state reaction method. The photocatalytic properties of these compounds were characterized by H2 evolution with Pt cocatalyst from CH3OH/H2O solution and by O2 evolution from AgNO3 aqueous solution under UV light irradiation. The results showed that the average rate of H2 evolution was about 61.07 μmol h-1 for La1/3NbO3 and 95.79 μmol h-1 for La1/3TaO3 after 24 hours of reaction time, while the initial rate of O2 evolution was 26.31 μmol h-1 for La1/3NbO3 and 16.21 μmol h-1 for La1/3TaO3, respectively. H2 evolution was also observed over La1/3MO3 (M = Nb, Ta) with NiO cocatalyst from pure water under UV light irradiation.

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Copyright © 2007 Dunfang Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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