Title

Solar production of hydrogen using "self-assembled" polyoxometalate photocatalysts

Authors

Authors

N. Muradov;A. T-Raissi

Comments

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Abbreviated Journal Title

J. Sol. Energy Eng. Trans.-ASME

Keywords

Energy & Fuels; Engineering, Mechanical

Abstract

The near-term and cost-effective production of solar hydrogen from inexpensive and readily available hydrogen containing compounds (HCCs) can boost the prospects of future hydrogen economy. In this paper we assess the prospects of the solar-assisted conversion of HCCs into hydrogen using polyoxometalate (POM) based photocatalysts, such as isopolytungstates (IPT) and silicotungstic acid (STA). Upon exposure to solar photons, IPT aqueous solutions containing various HCCs (e.g., alcohols, alkanes, organic acids, sugars, etc.) produce hydrogen gas and corresponding oxygenated compounds. The presence of small amounts of colloidal platinum increases the rate of hydrogen evolution by one order of magnitude. A solar photocatalytic flat-bed reactor approximately 1.2 in x 1.2 m in size, was fabricated and tested for the production of hydrogen from water-alcohol solutions containing IPT and STA and small amounts of colloidal Pt. The solar photoreactor tests demonstrated steady-state production of hydrogen gas for several days. IPT immobilized on granules of anion exchange resins with quaternary ammonium active groups show good photocatalytic activity for hydrogen production from water-alcohol solutions exposed to near-UV or solar radiation.

Journal Title

Journal of Solar Energy Engineering-Transactions of the Asme

Volume

128

Issue/Number

3

Publication Date

1-1-2006

Document Type

Article; Proceedings Paper

Language

English

First Page

326

Last Page

330

WOS Identifier

WOS:000239710100008

ISSN

0199-6231

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