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CO and ethanol oxidation over LaCoO3 planar model catalysts: Effect of the thickness

Paper ID Volume ID Publish Year Pages File Format Full-Text
51851 46856 2011 7 PDF Available
Title
CO and ethanol oxidation over LaCoO3 planar model catalysts: Effect of the thickness
Abstract

The catalytic performance of the LaCoO3 thin films toward CO and ethanol oxidation was studied in a reactor designed for the investigation of model planar catalysts. The effect of the thickness on the catalytic efficiency and the surface oxygen vacancies offers a straightforward method to identify or discriminate the oxygen species involved in the catalytic reaction. The weight-normalized reaction rate is demonstrated to be an intrinsic parameter and thus confirms the participation of the bulk lattice-oxygen in the studied catalytic reactions. Compared to other perovskite oxide powder catalysts, thin film catalysts show a remarkably higher activity toward ethanol and CO oxidation.

Graphical abstractThe weight-normalized rate over planar polycrystalline LaCoO3 catalysts with different thicknesses can be fitted with a single curve in the temperature range where the reactor can be considered as differential (conversion yield below 20%). This behavior hints at the involvement of the lattice oxygen in the catalytic oxidation of ethanol and CO.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► LaCoO3 films of different thicknesses were used in the oxidation of ethanol and CO. ► The involvement of the lattice oxygen in the catalytic reaction was demonstrated. ► Thin-film based catalysts exhibited higher intrinsic activity than their bulk counterpart.

Keywords
LaCoO3 thin film catalysts; Weight-normalized reaction rates; CO and ethanol oxidation and lattice-oxygen; Surface oxygen vacancies
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CO and ethanol oxidation over LaCoO3 planar model catalysts: Effect of the thickness
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 14, 15 August 2011, Pages 1344–1350
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