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Deposition of gold nanoparticles on carbons for aerobic glucose oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
42264 45918 2009 7 PDF Available
Title
Deposition of gold nanoparticles on carbons for aerobic glucose oxidation
Abstract

Carbon materials such as activated carbon and carbon black have long been used as adsorbents, electrodes, and supports for metal catalysts. However, no attempt has yet been reported to deposit Au as small nanoparticles (NPs) on these carbon materials directly from Au precursor compounds. Until now, the most effective way to support Au NPs on activated carbon was to physically mix a carbon support with Au colloids prepared beforehand. Here we report that Au could be deposited as NPs on carbon materials directly from gold precursor compounds by deposition reduction method and by solid grinding method. In particular, the solid grinding of carbons with dimethyl Au(III) acetylacetonate, which has a certain degree of vapor pressure at room temperature, is a simple technique but surprisingly effective to deposit Au NPs with a mean diameter as small as 1.9 nm. These highly dispersed Au NPs on carbon supports were tested for glucose oxidation in water with molecular oxygen. A Au/nanoporous carbon (NPC) catalyst which exhibited relatively high catalytic activity has been kinetically studied for comparison with Au/metal oxides catalysts.

Graphical abstractGold can be deposited as clusters as small as 1.9 nm in diameter on carbon materials directly from its precursor compounds by means of deposition reduction and solid grinding methods. These gold clusters showed sharp catalytic activity increase with a decrease in the mean diameters of Au nanoparticles in the range between 1 and 10 nm.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Gold nanoparticles; Carbon supports; Solid grinding; Glucose oxidation; Kinetic study
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Deposition of gold nanoparticles on carbons for aerobic glucose oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 369, Issues 1–2, 15 November 2009, Pages 8–14
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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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