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Outstanding activity of sub-nm Au clusters for photocatalytic hydrogen production

Paper ID Volume ID Publish Year Pages File Format Full-Text
46539 46441 2012 8 PDF Available
Title
Outstanding activity of sub-nm Au clusters for photocatalytic hydrogen production
Abstract

Developing sustainable methods of hydrogen production can have significant environmental and energy efficiency benefits. A potentially viable way forward is to produce hydrogen from water by combining solar energy and heterogeneous catalysts. Our results indicate that sub-nm gold particles can provide an enormous enhancement in photocatalytic hydrogen production under visible light. We have observed a 35 times increase in activity for Au modified CdS as compared to that of unmodified catalyst. This activity was much higher than that of any other co-catalysts tested, which included 2–4 nm Pt, Ru, Pd and Rh nanoparticles modified CdS. The activity of sub-nm Au was also much better than that of CdS modified with larger Au particles. Our first-principles calculations of unsupported Au clusters indicated that there is a substantial difference in both shape and electronic properties between charged and neutral bare Au clusters as well as between bare and ligand-protected ones. This is the first ever demonstration of the remarkable potential of sub-nm Au particles for H2 production.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights▸ This work is the first ever application of sub-nm Au co-catalysts for water splitting. ▸ Sub-nm gold particles are extraordinarily active for hydrogen production under visible light. ▸ This activity was much higher than that of any other co-catalysts tested. ▸ The activity of sub-nm Au was also much better than that of CdS modified with larger Au particles.

Keywords
Photocatalytic; Water splitting; Au clusters; Hydrogen production; Catalyst; TDDFT; CdS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 126, 25 September 2012, Pages 153–160
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