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QSTEM-based HAADF-STEM image analysis of Mo/V distribution in MoVTeTaO M1 phase and their correlations with surface reactivity

Paper ID Volume ID Publish Year Pages File Format Full-Text
38882 45795 2016 9 PDF Available
Title
QSTEM-based HAADF-STEM image analysis of Mo/V distribution in MoVTeTaO M1 phase and their correlations with surface reactivity
Abstract

•Three probability models (Model 1–3) were advanced and investigated in this study based on metal distributions determined by the QSTEM-based HAADF-STEM image analysis.•Model 1 was based on the probability of finding 1–2 V5+ cations in the proposed S3-S4-S4-S7-S7 catalytic center.•Models 2 and 3 were based on the total V content and probability of finding more than 2 V cations in the S2-S4-S4-S7-S7 catalytic center, respectively.•Correlations found for Model 3 emphasized the importance of multiple VOx sites present in the S2-S4-S4-S7-S7 catalytic center for catalytic reactivity in propane ammoxidation.

Three probability models (Model 1–3) were advanced and investigated in this study based on metal distributions determined by the QSTEM-based HAADF-STEM image analysis. The correlations between the Mo/V distributions in MoVTeTaO M1 phase catalysts and their catalytic behavior in propane ammoxidation were proposed for Model 1 (based on the probability of finding 1–2 V5+ cations in the proposed S3-S4-S4-S7-S7 catalytic center), Model 2 (based on the total V content in the S2-S4-S4-S7-S7 catalytic center), and Model 3 (based on the probability of finding more than 2 V cations in the S2-S4-S4-S7-S7 catalytic center). Model 1 suggested V5+ in S3 may activate propane. Model 2 and Model 3 emphasized the importance of total V content and multiple VOx sites in the S2-S4-S4-S7-S7 catalytic center for catalytic reactivity in propane ammoxidation, respectively.

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Keywords
MoVTeTaO M1 phase; Probability model; Propane ammoxidation; Quantitative HAADF-STEM image analysis; Aberration corrected HAADF-STEM
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QSTEM-based HAADF-STEM image analysis of Mo/V distribution in MoVTeTaO M1 phase and their correlations with surface reactivity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 512, 25 February 2016, Pages 27–35
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