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Production of electricity by photoelectrochemical oxidation of ethanol in a PhotoFuelCell

Paper ID Volume ID Publish Year Pages File Format Full-Text
47241 46464 2010 7 PDF Available
Title
Production of electricity by photoelectrochemical oxidation of ethanol in a PhotoFuelCell
Abstract

Photocatalytic oxidation of ethanol was carried out in a non-biased photoelectrochemical cell at high pH. The cell was made of two compartments separated by a silica frit, both filled with aerated NaOH electrolyte. The anode electrode bore multilayer nanocrystalline titania, made of either commercial Degussa P25, sol–gel synthesized titania or both. The cathode electrode was made of carbon cloth carrying Carbon Black and Pt as catalyst. When the anode was excited by UVA radiation (363 nm), the cell produced electricity very efficiently. The open-circuit voltage was 0.88 V in the absence and almost 1.2 V in the presence of ethanol. The current increased by more than an order of magnitude by adding ethanol, showing that it is much more efficient to oxidize ethanol than to oxidize (split) water. The performance of the cell improved when a compact titania layer was introduced between the FTO electrode and the thick photocatalytic layer. Ethanol was used as a model fuel but the cell can run on many other organic substances as well. The cell can be used as a source of renewable electricity, by consuming organic wastes under photo-excitation, thus making a PhotoFuelCell.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Ethanol as a model fuel in a Photofuelcell working at high basic pH. ▶ Current multiplication in the presence of ethanol compared to that obtained with water. ▶ High External Quantum Efficiency. ▶ Efficiency increases when commercial nanocrystalline titania is deposited on a compact sol–gel synthesized titania.

Keywords
Photoelectrochemical cell; Ethanol photocatalytic oxidation; PhotoFuelCell
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Production of electricity by photoelectrochemical oxidation of ethanol in a PhotoFuelCell
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 99, Issues 1–2, 31 August 2010, Pages 307–313
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us