fulltext.study @t Gmail

Water gas shift reaction on carbon-supported Pt catalysts promoted by CeO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
55584 47058 2012 6 PDF Available
Title
Water gas shift reaction on carbon-supported Pt catalysts promoted by CeO2
Abstract

The low temperature water gas shift reaction has been studied over carbon-supported platinum catalysts promoted by ceria. To this end, CeO2 has been dispersed over an activated carbon support at different loadings (20, 30 and 40 wt.%) in order to obtain a high ceria surface area. Then, platinum has been incorporated by impregnation with an acetone solution of [Pt(NH3)4](NO3)2. Two more catalysts have been prepared with aqueous and ethanolic solutions, respectively, to assess the effect of the solvent in the final catalysts. Pt/CeO2 and Pt/C catalysts have been used as references. Catalysts have been characterized (N2 adsorption at 77 K, TEM, H2-TPR) and tested in reaction after reduction with H2 at 473 K. The obtained results show that CO conversion increases with the amount of ceria loaded, from 20 to 40 wt.%. At this temperature, platinum supported on bulk CeO2 is less active than its carbon-based counterparts. The best results are obtained for the catalysts with 40 wt.% CeO2 prepared by aqueous impregnation of the platinum precursor, which achieves conversions higher than 70% at 573 K, and shows no deactivation under reaction at this temperature for 120 h. On the other hand, Pt/C shows a very low activity, this certifying the determinant role of ceria in this reaction. These results indicate that dispersion of ceria on activated carbon allows to obtain catalysts with superior performance than using bulk CeO2 as support, and with a lesser amount of ceria.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (165 K)Download as PowerPoint slideHighlights► Highly dispersed CeO2 was prepared on an activated carbon support. ► WGS reaction activity increases with the amount of ceria loaded. ► Carbon-supported catalysts are more active at 623 K than Pt/CeO2. ► Catalytic behavior strongly depends on platinum–ceria interaction.

Keywords
Carbon support; CeO2; Platinum; WGS
First Page Preview
Water gas shift reaction on carbon-supported Pt catalysts promoted by CeO2
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 180, Issue 1, 17 January 2012, Pages 19–24
Authors
, , , , ,
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