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Research project selected under the 2019 call for proposals

Principal Investigator : Katerina Soulantika

Involved Teams :

  • LPCNO / Nanostructures et Chimie Organométallique, NCO
  • CEMES / In situ interferometry and instrumentation for electron microscopy, I3EM
  • LCC / Catalyse et Chimie Fine

Type of project : Collaborative Project

Date (start/end) : 2019 – 2022

The effects of confinement in heterogeneous catalysis have been the subject of particular attention since they can affect catalyst activity, selectivity but also stability. Indeed, reaction energetics, mechanisms and dynamics could be significantly altered inside the pores of 1D (one-dimensional), 2D or 3D materials.

The CaSh project will focus on 2D confined nanoreactors created by combining together noble metal nanosheets, recently prepared by the LPCNO, and graphene sheets. Ligand exchange between the native ligands of the metal sheets and graphene, which can be considered as a macromolecular ligand, will be employed for the elaboration of catalysts, which will be tested in reactions involving small molecules, (H2, O2, CO) in order to investigate confinement effects resulting from the formation of 2D nanoreactors. (see figure)

The CaSh project brings together three academic laboratories in the complementary fields of the project: nano-object synthesis and modeling (LPCNO), nanometerial advanced characterization (CEMES), and catalysis (LCC).

Schematic representation of the catalyst elaboration: exchange between native stabilizers of the metal nanosheets (M-NS) and graphene (G) leading to the formation of 2D nanoreactors where catalysis can take place in a confined environment.

The methodology to be followed by the CaSh project partners involves: i) the preparation of the catalytic systems; ii) the fine catalyst characterization by several techniques; iii) catalytic screening and iv) the integration of modeling in order to better understand different aspects of confined catalysis on activity, selectivity and stability.