Journal Articles Angewandte Chemie International Edition Year : 2020

Magnetically-induced CO 2 methanation using exchange - coupled spinel ferrites in cuboctahedron-shaped nanocrystals

Abstract

A magnetically induced catalysis can be promoted taking advantage of optimal heating properties from the magnetic nanoparticles to be employed. However, if 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: a) show an excellent performance as heating agents in the CO 2 methanation catalyzed by Ni/SiRAlOx, with CH 4 yields above 95%, and b) 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 CoFe 2 O 4-soft Fe 3 O 4 nanoparticles.

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hal-02879785 , version 1 (24-06-2020)

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  • HAL Id : hal-02879785 , version 1

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Beatriz Rivas-Murias, Juan Manuel Asensio, Nicolas Mille, Benito Rodriguez-Gonzalez, Pier-Francesco Fazzini, et al.. Magnetically-induced CO 2 methanation using exchange - coupled spinel ferrites in cuboctahedron-shaped nanocrystals. Angewandte Chemie International Edition, In press. ⟨hal-02879785⟩
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