Magnetically Induced CO2 Methanation Using Exchange-Coupled Spinel Ferrites in Cuboctahedron-Shaped Nanocrystals |
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Authors: | Dr Beatriz Rivas-Murias Dr Juan M Asensio Dr Nicolas Mille Dr Benito Rodríguez-González Dr Pier-Francesco Fazzini Dr Julian Carrey Dr Bruno Chaudret Dr Verónica Salgueiriño |
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Institution: | 1. Departamento de Física Aplicada and CINBIO, Universidade de Vigo, 36310 Vigo, Spain;2. Laboratoire de Physique et Chimie des Nano-Objets (LPCNO), Université de Toulouse, CNRS, INSA, UPS, 135 avenue de Rangueil, 31077 Toulouse, France;3. CACTI, Universidade de Vigo, 36310 Vigo, Spain |
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Abstract: | Magnetically induced catalysis can be promoted taking advantage of optimal heating properties from the magnetic nanoparticles to be employed. However, when unprotected, these heating agents that are usually air-sensitive, get sintered under the harsh catalytic conditions. In this context, we present, to the best of our knowledge, the first example of air-stable magnetic nanoparticles that: 1) show excellent performance as heating agents in the CO2 methanation catalyzed by Ni/SiRAlOx, with CH4 yields above 95 %, and 2) do not sinter under reaction conditions. To attain both characteristics we demonstrate, first the exchange-coupled magnetic approach as an alternative and effective way to tune the magnetic response and heating efficiency, and second, the chemical stability of cuboctahedron-shaped core–shell hard CoFe2O4–soft Fe3O4 nanoparticles. |
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Keywords: | CO2 methanation core–shell nanostructures magnetic nanoparticles spinel ferrite |
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