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Magnetically Induced CO 2 Methanation Using Exchange‐Coupled Spinel Ferrites in Cuboctahedron‐Shaped Nanocrystals
Author(s) -
RivasMurias Beatriz,
Asensio Juan M.,
Mille Nicolas,
RodríguezGonzález Benito,
Fazzini PierFrancesco,
Carrey Julian,
Chaudret Bruno,
Salgueiriño Verónica
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202004908
Subject(s) - spinel , methanation , catalysis , nanoparticle , materials science , chemical engineering , nanocrystal , context (archaeology) , magnetic nanoparticles , magnetic separation , nanotechnology , chemistry , metallurgy , organic chemistry , paleontology , engineering , biology
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 CO 2 methanation catalyzed by Ni/SiRAlOx, with CH 4 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 CoFe 2 O 4 –soft Fe 3 O 4 nanoparticles.