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

Title
Effects of B-site substitution on the surface adsorption properties and catalytic activities of La0.8Sr0.2(Mn1-xCox)O3
Authors
안기용김형철정용재김혜령손지원이해원이종호
Keywords
SOFC; perovskite oxide; catalytic oxidation; oxygen adsorption; Gas chromatography; X-ray photoelectron spectroscopy
Issue Date
2010-10
Publisher
Applied catalysis A, General
Citation
VOL 387, NO 1-2, 203-208
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 ㎡ 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 ℃ 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.
URI
http://pubs.kist.re.kr/handle/201004/37973
ISSN
0926-860X
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