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Determination of the dispersion of supported Pt particles by gas-phase and liquid-phase measurements

Paper ID Volume ID Publish Year Pages File Format Full-Text
51476 46843 2009 4 PDF Available
Title
Determination of the dispersion of supported Pt particles by gas-phase and liquid-phase measurements
Abstract

The dispersion of a Pt/γ-Al2O3 catalyst was investigated by various experimental techniques. The values obtained by gas-phase hydrogen and carbon monoxide adsorption and transmission electron microscopy (TEM) were consistent for the metal:adsorbate stoichiometry of 1:1. However, these methods overestimated the number of active sites available for a liquid-phase reaction. For the hydrogenation of styrene in the presence of CS2 as a catalyst poison, only the defect sites were found to be active in the catalytic reaction. The defect sites were related to the initial coverage dependent region of the adsorption heats measured by gas-phase microcalorimetry.

Keywords
Microcalorimetry; Pt; CS2 poisoning; Styrene hydrogenation
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Determination of the dispersion of supported Pt particles by gas-phase and liquid-phase measurements
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 6, 15 February 2009, Pages 1002–1005
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
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