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Carbon nanotubes supported Pt catalysts for phenylacetylene hydrogenation: effects of oxygen containing surface groups on Pt dispersion and catalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
55484 47055 2012 7 PDF Available
Title
Carbon nanotubes supported Pt catalysts for phenylacetylene hydrogenation: effects of oxygen containing surface groups on Pt dispersion and catalytic performance
Abstract

Carbon nanotubes with different surface groups were achieved by oxidative treatments with HNO3–H2SO4 and followed thermal treatments. Deposition of Pt particles onto carbon nanotubes was achieved through chemical reduction of H2PtCl6·6H2O by ethylene glycol in the presence of NaOH. The as-prepared samples were characterized by temperature programmed desorption, Fourier transform infrared spectroscopy, X-ray diffraction and high resolution transmission electron microscopy. The type and amount of surface oxygen functional groups on the carbon nanotubes can be regulated by thermal treatments at different temperatures in an inert atmosphere. Both dispersion and sintering resistance of Pt nanoparticles were found to be a function of amount of oxygen surface groups on the carbon nanotubes, however, the amount of oxygen surface groups apparently did not affect the Pt loading on the carbon nanotubes. The Pt nanoparticles supported on the functionalized carbon nanotubes by oxidation treatment gave superior catalytic activity for the phenylacetylene hydrogenation, which phenylacetylene conversion and selectivity to styrene are 99% and 88%, respectively. This may be due to the higher dispersion (i.e., smaller particle size) of the Pt nanoparticles, which is beneficial for the hydrogenation of phenylacetylene.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (274 K)Download as PowerPoint slideHighlights► Type and amount of oxygen groups on CNTs were regulated by thermal treatments. ► Deposition and dispersion of Pt particles are largely dependent on CNTs surface. ► Carbonxylate groups play an important role in preparing well-dispersed Pt/oCNTs. ► Pt/oCNTs catalysts are active and selective in phenylacetylene hydrogenation.

Keywords
Carbon nanotubes; Oxygen-containing groups; Pt catalysts; Hydrogenation; Phenylacetylene
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Carbon nanotubes supported Pt catalysts for phenylacetylene hydrogenation: effects of oxygen containing surface groups on Pt dispersion and catalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 186, Issue 1, 1 June 2012, Pages 69–75
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