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In situ XANES study of methanol decomposition and partial oxidation to syn-gas over supported Pt catalyst on SrTiO3 nanocubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
53978 46991 2014 9 PDF Available
Title
In situ XANES study of methanol decomposition and partial oxidation to syn-gas over supported Pt catalyst on SrTiO3 nanocubes
Abstract

•In situ XANES is used to study methanol decomposition and partial oxidation on a supported Pt catalyst.•The catalyst is made by ALD of Pt on a single crystal of SrTiO3 nanocube with Pt (1 1 1) nanoparticles on the surface.•The as-received catalyst and the reduced or oxidized catalyst all have activity but show different selectivity for H2, CO and CO2.•In situ XANES observed CO on Pt the only surface adsorption species during the reactions.•The study confirms that the mechanism only includes the breakage of C–H and O–H bonds.

A catalyst of Pt nanoparticles was prepared by atomic layer deposition on SrTiO3 nanocuboids and tested for methanol decomposition and partial oxidation. The catalyst had uniform nanoparticle size of 1.58 ± 0.37 nm and a Pt (1 1 1) surface. In situ X-ray absorption near-edge spectroscopy (XANES) measured in a temperature-programmed reduction showed that the Pt particles were easily reduced. However, the as-received catalyst, a reduced catalyst, and an oxidized catalyst all had catalytic activity, differing slightly in methanol conversion and product selectivity. In situ XANES also revealed that CO adsorbed on the Pt sites was the only observed surface species during both methanol decomposition and partial oxidation. It seemed that the breakage of CH and OH bonds overwhelmingly occurred once methanol was adsorbed, forming H2 and adsorbed CO. The latter was then released from the catalyst surface or was oxidized to CO2 when O2 was present.

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Keywords
Methanol; Decomposition; Partial oxidation; In situ XANES; SrTiO3 nanocuboid; Platinum nanoparticle
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In situ XANES study of methanol decomposition and partial oxidation to syn-gas over supported Pt catalyst on SrTiO3 nanocubes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 237, 15 November 2014, Pages 71–79
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