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Enhancing solar hydrogen production via modified photochemical treatment of Pt/CdS photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
54984 47035 2013 6 PDF Available
Title
Enhancing solar hydrogen production via modified photochemical treatment of Pt/CdS photocatalyst
Abstract

A modified photoetching process is found to significantly improve the photocatalytic activity of Pt/CdS photocatalyst for solar hydrogen production. The photoetching process was carried out by dispersing Pt/CdS photocatalyst particles in an aqueous ammonium sulfite ((NH4)2SO3) solution under a vacuum-degassed condition. The Pt/CdS particles were then exposed to photo-radiation (350–800 nm) for 20 h. The rate of hydrogen production via visible light photooxidation of aqueous (NH4)2SO3 solution over the photochemically treated Pt/CdS is about 130 times higher than that of untreated Pt/CdS samples. Effects of platinum loading technologies on the photocatalytic activity of Pt/CdS photocatalyst for hydrogen production are also investigated in this paper. Photochemically deposited Pt/CdS photocatalyst in an aqueous ammonium sulfite solution has shown a 100% increase in hydrogen production rate over that of photocatalysts traditionally photo-platinized in an aqueous glacial acetic acid solution. The prepared catalysts are characterized using XRD, FESEM, TEM, BET and XPS techniques and the changes of Pt particle size and surface elementary states of Cd and S are observed before and after the photoetching process.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (94 K)Download as PowerPoint slideHighlight► We report a new approach for photoetching Pt/CdS. ► The modified photoetching process is carried in aqueous ammonium sulfite solution. ► Significant enhancement of the photocatalytic activities was observed. ► Effects of platinum loading technologies were also investigated.

Keywords
Photocatalysis; Hydrogen; Photoetching; Cadmium sulfide; Platinum
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Enhancing solar hydrogen production via modified photochemical treatment of Pt/CdS photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 199, 1 January 2013, Pages 42–47
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