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Experimental evidences of the relationship between reducibility and micro- and nanostructure in commercial high surface area ceria

Paper ID Volume ID Publish Year Pages File Format Full-Text
39744 45834 2014 10 PDF Available
Title
Experimental evidences of the relationship between reducibility and micro- and nanostructure in commercial high surface area ceria
Abstract

•Reducibility and nanostructure are experimentally related in commercial ceria.•Rietveld analysis and HREM show nanoparticles induce low temperature Ce4+ reduction.•Kinetic and theoretical models are supported by morphological characterization.•Key parameters to select appropriate CeO2 samples for catalytic uses are unveiled.

Two commercial high BET surface areas CeO2 are characterized, as received and after calcination at different temperatures, to better understand the relationship between reducibility and micro- and nanostructure. Combination of TPR data, Rietveld analysis of XRD diagrams and HREM/HAADF-STEM suggest that the nano-particles are responsible for Ce4+ reduction in the moderate temperature range. Results obtained in this work show that previous models based on kinetic and theoretical analysis can be fully supported by morphological characterization. This study unveils the key parameters that must be known in order to select appropriate commercial ceria samples.

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Keywords
CeO2; Reduction behaviour; Nanostructure; Rietveld analysis; HAADF-STEM.
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Experimental evidences of the relationship between reducibility and micro- and nanostructure in commercial high surface area ceria
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 479, 5 June 2014, Pages 35–44
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
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