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Surface properties of Mg doped LaCoO3 particles with large surface areas and their enhanced catalytic activity for CO oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
41579 45893 2011 5 PDF Available
Title
Surface properties of Mg doped LaCoO3 particles with large surface areas and their enhanced catalytic activity for CO oxidation
Abstract

Mg-doped LaCoO3 particles were prepared in various particle sizes via a modified sol–gel method using excess MgO as pinning particles. The adsorbed oxygen species of the products were studied by XPS, TPD-O2 and TPR-H2. The amount of adsorbed oxygen varied with changes in average particle size and had an important effect on the catalytic activity towards CO oxidation. XPS and TPD-O2 results indicated that there were two kinds of surface oxygen species and that the relative ratio of the surface adsorbed oxygen to lattice oxygen increased with an increasing BET surface area. The catalytic activities of Mg-doped LaCoO3 particles were clearly enhanced with the increase of surface area and the amount of adsorbed oxygen.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (115 K)Download as PowerPoint slideHighlights► Mg-doped LaCoO3 particles were prepared in various particle sizes. ► The particle size had influence on the adsorbed oxygen species. ► The adsorbed oxygen took effect on the catalytic activity of Mg-doped LaCoO3. ► The desorption temperature of oxygen varied with changes in average particle size.

Keywords
Mg-doped LaCoO3; Sol–gel; CO oxidation; Perovskite
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Surface properties of Mg doped LaCoO3 particles with large surface areas and their enhanced catalytic activity for CO oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 401, Issues 1–2, 15 July 2011, Pages 199–203
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us