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Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream

Paper ID Volume ID Publish Year Pages File Format Full-Text
52568 46877 2007 9 PDF Available
Title
Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream
Abstract

The catalytic activity of nanosize gold catalysts supported on MnO2–TiO2 and prepared by deposition–precipitation method has been investigated for preferential oxidation of carbon monoxide in H2 stream. The catalysts were characterized by inductively coupled plasma-atomic emission spectroscopy, X-ray diffraction, nitrogen sorption, transmission electron microscopy, and X-ray photoelectron spectroscopy. The influence of pH in the preparation process and the amount of MnO2 loading on the catalytic properties of the Au/MnO2–TiO2 catalysts were also studied. Fine dispersion of gold nanoparticles on all the supports was obtained. Especially, Au/MnO2–TiO2 with MnO2/TiO2 mol ratio of 2:98, showed a mean Au particle size of 2.37 nm. The nanosized support constrained the size of gold. The addition of MnO2 on Au/TiO2 catalyst improved the selectivity of CO oxidation without sacrificing CO conversion in hydrogen stream between 50 and 100 °C. This could be attributed to the interactions of gold metal with MnO2–TiO2 support and the optimum combination of metallic and electron-deficient gold on the catalyst surface.

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Au/MnO2–TiO2 catalyst for preferential oxidation of carbon monoxide in hydrogen stream
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 11, November 2007, Pages 1702–1710
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
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