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Synthesis of ceria-praseodimia nanotubes with high catalytic activity for CO oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
55603 47058 2012 7 PDF Available
Title
Synthesis of ceria-praseodimia nanotubes with high catalytic activity for CO oxidation
Abstract

Ceria-praseodimia nanotubes (Ce0.8Pr0.2O2−δ–NT) have been synthesized for the first time employing a template-based electrodeposition method inside the pores of anodic aluminum oxide (AAO) membranes. Various electron microscopy techniques such as Field Emission Gun Scanning Electron Microscopy (FEG-SEM), Scanning Transmission Electron Microscopy working in High Angle Annular Dark-Field mode (STEM-HAADF), High Resolution Transmision Electron Microscopy (HRTEM), Energy-dispersive X-ray Spectroscopy (X-EDS), Electron Energy Loss Spectroscopy (EELS) and Energy Filtered Transmision Electron Microscopy (EFTEM) have been used to characterise the morphology, structure and chemical composition of the nanotubes. The results indicate that nanotubes are formed by nanocrystals of cerium and praseodymium mixed oxide. Furthermore, the system Ce0.8Pr0.2O2−δ–NT/AAO shows a better performance in the CO oxidation reaction than both powdered Ce0.8Pr0.2O2−δ prepared by conventional methods and CeO2–NT/AAO. These results have been discussed and related to the synergistic effect of doping and nanostructuration of CeO2.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (249 K)Download as PowerPoint slideHighlights► Ce–Pr–O nanotubes (CexPr1−xO2−δ–NT) have been synthesized for the first time. ► The nanomaterials were characterized with several EM techniques and XRD. ► The obtained nanotubes are formed by nanocrystals of Ce–Pr mixed oxide. ► The catalytic activity of CexPr1−xO2−δ–NT was evaluated for the first time. ► CexPr1−xO2−δ–NT/template system shows enhanced catalytic activity.

Keywords
Cerium; Praseodymium; Template-based electrodeposition; Nanotube; CO oxidation
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Synthesis of ceria-praseodimia nanotubes with high catalytic activity for CO oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 180, Issue 1, 17 January 2012, Pages 167–173
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