Manganese oxidation states repartition in a channel-like mesoporous zirconium oxide

Nelly Couzon (1) , Laurence Bois (1) , Clémentine Fellah (2) , Cristian Loestean (3) , Fernand Chassagneux (1) , Rodica Chiriac (1) , Francois Toche (1) , Lhoussain Khrouz (4) , Arnaud Brioude (1) , Ovidiu Ersen (5) , Lucian Roiban (6)

1 LMI - Laboratoire des Multimatériaux et Interfaces
2 ENS de Lyon - École normale supérieure de Lyon
3 INCDTIM - National Institute for Research and Development of Isotopic and Molecular Technologies
4 LC - Laboratoire de Chimie - UMR5182
5 IPCMS - Institut de Physique et Chimie des Matériaux de Strasbourg
6 MATEIS - Matériaux, ingénierie et science [Villeurbanne]

Here, we present a mesoporous mixed manganese zirconium oxide (MnZr) synthesized by evaporation induced self-assembly (EISA) method involving a block copolymer self-assembly method. The MnZr oxide has been fully characterized by X-ray diffraction, transmission electronic microscopy, analytical electronic tomography, nitrogen adsorption/desorption isotherms, thermogravimetric analysis, X-ray photoelectron spectroscopy and electronic paramagnetic resonance. Electronic tomography analysis reveals that a mesoporous solid solution MnZr was successfully obtained by this way, with a homogeneous dispersion of Mn. X-ray diffraction, X-ray photoelectron spectroscopy, thermal analysis and electronic paramagnetic resonance inform about the manganese oxidation states present (II, III and IV) and their location within the sample.

Mots clés: analytical electron tomography; mesoporous; zirconium; manganese; self-assembly block copolymer

Domaines: Matériaux

Nelly Couzon, Laurence Bois, Clémentine Fellah, Cristian Loestean, Fernand Chassagneux, et al.. Manganese oxidation states repartition in a channel-like mesoporous zirconium oxide. Journal of Porous Materials, 2020, ⟨10.1007/s10934-020-00962-5⟩. ⟨hal-03047301⟩