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Photoeletrochemical generation of hydrogen over carbon-doped TiO2 photoanode

Paper ID Volume ID Publish Year Pages File Format Full-Text
47512 46474 2009 9 PDF Available
Title
Photoeletrochemical generation of hydrogen over carbon-doped TiO2 photoanode
Abstract

Nanostructured carbon-doped TiO2 (C-TiO2) thin film was prepared by pulsed laser deposition (PLD) on ITO substrate. Results of X-ray diffraction (XRD) analysis of the thin film showed that the crystal structure of the C-TiO2 was a hybrid of rutile and anatase. Data of X-ray photoelectron spectroscopic (XPS) analysis confirmed the successful incorporation of carbon into TiO2 molecules, which formed defects. These defects narrowed the band gap of the C-TiO2 from 3.25 eV of pure TiO2 to 3.15 eV. The photoelectrochemical property of the C-TiO2 film was examined by evaluating the efficiency of hydrogen generation by water splitting in a two-compartment electrochemical system. The fastest rate of gas production was obtained when the thin film was irradiated by light at a wavelength of 325 nm; the photoresponse under visible radiation was limited, however. Applying a bias potential across the photoanode and its counter electrode can increase hydrogen generation effectively. Organic substance added to the photoanodic chamber was photocatalytically degraded which increased the photocurrent and subsequently enhanced hydrogen generation.

Keywords
C-TiO2; Hydrogen generation; Photoelectrochemical process; Sacrificial reagents
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Photoeletrochemical generation of hydrogen over carbon-doped TiO2 photoanode
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 92, Issues 1–2, 19 October 2009, Pages 41–49
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
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