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Physicochemical and catalytic properties of sol gel-prepared copper-chromium oxides

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Abstract

Nanostructured copper-chromium oxides were prepared by the sol–gel process (SG) and were characterised by elemental analysis, thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and by their activity in methane combustion. A comparative study was made with copper chromites commercial catalysts. The as-synthesised copper chromites sample exhibited higher specific surface area (248 m2 g−1) with respect to commercial solids (42 m2 g−1). The surface quantitative analysis evidenced a Cr6+ enrichment for the SG catalyst (Cr6+/Cr3+=0.56) with respect to commercial sample (0.39), while the ratio of copper species Cu2+/(Cu° + Cu+) was the same in both solids. Catalytic activity of SG solids in methane combustion was found to be comparable to that of Pt/Al2O3 and superior to that of commercial copper chromites tested under the same conditions.

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Authors and Affiliations

  1. Université Lyon 1, 69622, Villeurbanne, France

    N. Dupont, A. Kaddouri & P. Gélin

  2. CNRS, UMR 5256, IRCELYON, Institut de recherches sur la catalyse et l’environnement de Lyon, 2 av. Albert Einstein, 69626, Villeurbanne, France

    N. Dupont, A. Kaddouri & P. Gélin

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  1. N. Dupont
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  2. A. Kaddouri
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  3. P. Gélin
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Correspondence to A. Kaddouri.

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Dupont, N., Kaddouri, A. & Gélin, P. Physicochemical and catalytic properties of sol gel-prepared copper-chromium oxides. J Sol-Gel Sci Technol 58, 302–306 (2011). https://doi.org/10.1007/s10971-010-2391-6

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  • DOI: https://doi.org/10.1007/s10971-010-2391-6

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