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Bulk oxygen promoted water–gas shift reaction activity over Pt/Ce0.6Zr0.4O2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
49786 46766 2013 5 PDF Available
Title
Bulk oxygen promoted water–gas shift reaction activity over Pt/Ce0.6Zr0.4O2 catalyst
Abstract

•Pt/Ce0.6Zr0.4O2 exhibits faster WGS reaction kinetics.•Pt/Ce0.6Zr0.4O2 catalyst exhibit less carbonaceous deposition during WGS reaction.•Surface oxygen vacancies of Pt/Ce0.6Zr0.4O2 diffuse into the bulk.•The oxygen storage capacity was higher for Pt/Ce0.6Zr0.4O2 catalyst.

The water–gas shift (WGS) reaction of Pt/Ce0.6Zr0.4O2 catalyst was studied, as well as the reference catalysts Pt/CeO2 and Pt/ZrO2. In situ electronic conductivity measurements under reactive atmosphere show that surface oxygen vacancies of Pt/Ce0.6Zr0.4O2 diffuse into the bulk materials at the temperature typical for the operation of WGS reaction, i.e., bellow 623 K. Compared with Pt/CeO2, it was found that the oxygen storage capacity (OSC) was higher for Pt/Ce0.6Zr0.4O2 catalyst. Pt/Ce0.6Zr0.4O2 shows a markedly higher CO conversion rate than Pt/CeO2 and Pt/ZrO2 catalysts, which was interpreted by more active oxygen species available and higher coke resistance.

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Keywords
WGS reaction; Ceria–zirconia solid solution; Pt-based catalysts; Oxygen storage capacity; In situ electronic conductivity
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Bulk oxygen promoted water–gas shift reaction activity over Pt/Ce0.6Zr0.4O2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 42, 5 December 2013, Pages 45–49
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