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Performance enhancement in the water–gas shift reaction of platinum deposited over a cerium-modified TiO2 support

Paper ID Volume ID Publish Year Pages File Format Full-Text
53071 46901 2008 7 PDF Available
Title
Performance enhancement in the water–gas shift reaction of platinum deposited over a cerium-modified TiO2 support
Abstract

A novel catalyst consisting of platinum deposited over a cerium-modified titania substrate has been studied. Pt supported on Ce-modified TiO2 catalyt shows better thermal stability respect to bare TiO2 support and higher WGS activity than those corresponding to individual titania and ceria supports, indicating a cooperative effect between Pt and the Ce-modified TiO2 support. XPS and TPR results revealed the intimate contact between Pt and cerium entities in the Pt/Ce–TiO2 catalyst that facilitates the reducibility of the support at low-temperatures while the Ce–O–Ti surface interactions established in the Ce-modifed support TiO2 decrease the overreduction of TiO2 at high-temperature. Comparison of catalytic activity with catalysts characterization suggests that the modifications in the reducibility of the support and the stability of metallic particles when platinum is supported on cerium-modified TiO2 are responsible of the better catalytic behaviour of this sample in the water–gas shift reaction.

Keywords
Platinum; TiO2; CeO2; Water–gas shift
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Performance enhancement in the water–gas shift reaction of platinum deposited over a cerium-modified TiO2 support
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 9, Issue 8, 20 April 2008, Pages 1759–1765
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
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Full-text PDF Download
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