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• W2002294190 abstract "Abstract In this paper a strontium- and iron-doped lanthanum gallate (La 0.8 Sr 0.2 Ga 0.8 Fe 0.2 O 3 —LSGF) is prepared by Pechini process and polyacrylamide gel method. The powders are characterized by means of X-ray Diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance Infrared Fourier Transform spectroscopy (DRIFT), Thermal Programmed Desorption (TPD), Thermal Programmed Reduction (TPR), BET specific surface area, UV–Vis and Mossbauer Spectroscopy (MS). The activity toward methanol and ethanol is investigated by Infrared (IR) spectroscopy and Quadrupolar Mass Spectrometry (QMS) under several conditions. XRD outcomes reveal the formation of the desired perovskite phase at 900 °C, however, small amounts of secondary phases are also present. LSGF synthesized by Pechini process is characterized by a lower amount of secondary phases. On the other hand, LSGF from polyacrylamide gel method has a higher specific surface area. XPS data show that the two samples differ for surface cations segregation, hydroxylation degree and carbonate contamination. These results are also confirmed by DRIFT and TPD measurements. MS and TPR analyses reveal the presence of a small amount of Fe(IV), which is reduced to Fe(III) with H 2 (5% in Ar) at about 450 °C and with CH 3 OH vapours at 200 °C. Catalytic tests prove that methanol is mainly decomposed into H 2 and CO at 400 °C, but small amounts of CO 2 are also detected. Ethanol undergoes essentially dehydrogenation thus forming acetaldehyde and H 2 . In oxidizing conditions, both alcohols are oxidized to CO 2 and H 2 O at 400 °C, nevertheless, partially oxidized products are also observed. Acetaldehyde is an important product in ethanol oxidation. Under steam reforming conditions, methanol and ethanol give H 2 , CO and CO 2 , but acetaldehyde is also observed in ethanol steam reforming. The presence of acetaldehyde, when dealing with ethanol, suggests a difficult C–C bond break. Both the LSGF samples undergo poisoning during the reactions." @default.
• W2002294190 created "2016-06-24" @default.
• W2002294190 creator A5016914969 @default.
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• W2002294190 date "2010-06-18" @default.
• W2002294190 modified "2023-09-25" @default.
• W2002294190 title "La0.8Sr0.2Ga0.8Fe0.2O3−δ: Influence of the preparation procedure on reactivity toward methanol and ethanol" @default.
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• W2002294190 doi "https://doi.org/10.1016/j.apcatb.2010.04.004" @default.
• W2002294190 hasPublicationYear "2010" @default.
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