Ultra-Stable Magnetic Nanoparticles Encapsulated in Carbon for Magnetically Induced Catalysis

Luis Miguel Martinez-Pietro (1) , Julien Marbaix (2) , Juan Manuel Asensio (2) , Christian Cerezo-Navarrete (1) , Pier-Francesco Fazzini (2) , Katerina Soulantica (2) , Bruno Chaudret (2) , Avelino Corma (1)

1 ITQ - Instituto de Tecnología Química
2 LPCNO - Laboratoire de physique et chimie des nano-objets

Magnetically induced catalysis using magnetic nanoparticles (MagNPs) as heating agents is a new efficient method to perform reactions at high temperatures. However, the main limitation is the lack of stability of the catalysts operating in such harsh conditions. Normally, above 500 ºC, significant sintering of MagNPs takes place. Here we present encapsulated magnetic FeCo and Co NPs in carbon (Co@C and FeCo@C) as an ultra-stable heating material suitable for high temperature magnetic catalysis. Indeed, FeCo@C or a mixture of FeCo@C:Co@C (2:1) decorated with Ni or Pt-Sn showed good stability in terms of temperature and catalytic performances. In addition, consistent conversions and selectivities regarding conventional heating were observed for CO2 methanation (Sabatier Reaction), propane dehydrogenation (PDH) and propane dry reforming (PDR). Thus, the encapsulation of MagNPs in carbon constitutes a major advance in the development of stable catalysts for high temperature magnetically induced catalysis.

Mots clés: magnetic nanoparticles; carbon encapsulation; magnetic catalysis; methanation; propane dry reforming; propane dehydrogenation

Domaines: Chimie; Catalyse; Chimie inorganique; Matériaux; Physique [physics]

Luis Miguel Martinez-Pietro, Julien Marbaix, Juan Manuel Asensio, Christian Cerezo-Navarrete, Pier-Francesco Fazzini, et al.. Ultra-Stable Magnetic Nanoparticles Encapsulated in Carbon for Magnetically Induced Catalysis. ACS Applied Nano Materials, In press, ⟨10.1021/acsanm.0c01392⟩. ⟨hal-02882916⟩