Ce (III) species supported zeolites as novel photocatalysts for hydrogen production from water

Ce (III) species supported zeolites as novel photocatalysts for hydrogen production from water

Cerium (0.3–3.2 wt.%) modified MCM-41, Al-MCM-41, HZSM-5 and HY systems were prepared by impregnation method. These catalysts were characterized by XRD, DRS and XPS techniques. DRS clearly shows a blue shift of 50 nm in the absorption edge of CeO 2 at low loadings of Ce on zeolites indicating the si...

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Bibliographic Details
Published in:Catalysis today Vol. 141; no. 1; pp. 89 - 93
Main Authors: Krishna Reddy, J., Suresh, G., Hymavathi, C.H., Durga Kumari, V., Subrahmanyam, M.
Format: Journal Article
Language:English
Published: Elsevier B.V 15-03-2009
Subjects:
Cerium
Photocatalysts
Water splitting
Zeolite support
Zeolite support
Cerium
Water splitting
Photocatalysts
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Summary:Cerium (0.3–3.2 wt.%) modified MCM-41, Al-MCM-41, HZSM-5 and HY systems were prepared by impregnation method. These catalysts were characterized by XRD, DRS and XPS techniques. DRS clearly shows a blue shift of 50 nm in the absorption edge of CeO 2 at low loadings of Ce on zeolites indicating the size quantization and high dispersion of cerium particles. XPS analyses of samples containing low cerium content revealed the existence of strong interaction between zeolites and cerium wherein most of the cerium is in Ce 3+ state. Photoactivity of these Ce-modified zeolite catalysts was evaluated in the photogeneration of hydrogen from water under UV irradiation. Among the catalysts prepared Ce-MCM-41 was found to be a promising photocatalyst for hydrogen production from water.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2008.05.012