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Effects of B-site substitution on the surface adsorption properties and catalytic activities of La0.8Sr0.2(Mn1−xCox)O3

Paper ID Volume ID Publish Year Pages File Format Full-Text
41804 45900 2010 6 PDF Available
Title
Effects of B-site substitution on the surface adsorption properties and catalytic activities of La0.8Sr0.2(Mn1−xCox)O3
Abstract

In this study, surface adsorption capabilities and corresponding catalytic activities of perovskite-type La0.8Sr0.2(Mn1−xCox)O3 (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) oxides with controlled surface areas of 3–4 m2 g−1 were investigated. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) were used to examine the surface adsorption property of perovskite oxides. The catalytic activity of La0.8Sr0.2(Mn1−xCox)O3 on methane conversion was investigated via gas chromatography (GC) in the temperature range of 400–700 °C under a fixed methane-to-oxygen ratio (CH4/O2) of 1.5. According to our investigation, the surface adsorption characteristics were improved with the increase of cobalt content in the B-site of La0.8Sr0.2(Mn1−xCox)O3. Such improvements consequently enhanced the overall conversion efficiency of methane.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (114 K)Download as PowerPoint slideResearch highlights▶ The intensity of the O1s signal at 530.7–531.4 eV increases as temperature increases. ▶ The intensity of the O1s signal at 530.7–531.4 eV increases as Co content increases. ▶ Oxygen adsorption increases with the increase of Co content in La0.8Sr0.2(Mn1−xCox)O3. ▶ Substitution of Mn with Co enhanced the overall conversion efficiency of methane.

Keywords
SOFC; Perovskite oxide; Catalytic oxidation; Gas chromatography; X-ray photoelectron spectroscopy; Oxygen adsorption
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Effects of B-site substitution on the surface adsorption properties and catalytic activities of La0.8Sr0.2(Mn1−xCox)O3
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 387, Issues 1–2, 20 October 2010, Pages 203–208
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