Auteur/autrice : david

Publié le

Mechanisms of oxygen evolution and oxygen reduction electrocatalysis on perovskite oxides: paper in ACS Catalysis

We have designed mutlicationic perovskite nano-objects and have shown that the mechanisms of water oxidation and of oxygen reduction depend on the cationic composition, making it possible to switch to adjust the involvement of lattice oxygen anions in the catalysis. Nice work specially from Madeleine and Isabel, in collaboration with SOLEIL synchrotron, IPCMS (Strasbourg) and UCMadrid.

Tuning of Oxygen Electrocatalysis in Perovskite Oxide Nanoparticles by the Cationic Composition
M. Han, I. Gómez-Recio, D. Gutiérrez Martín, N. Ortiz Peña, M. L. Ruiz-González, M. Selmane, J. M. González-Calbet, O. Ersen, A. Zitolo, B. Lassalle-Kaiser*, D. Portehault*, C. Laberty-Robert*, ACS Catalysis, 13, 8, 5733–5743 (2023)

Publié le

Two new doctors from the group!

Time has flown since last post! We were too busy with many things. First, Edouard and Daniel successfully and brilliantly defended their theses in September-October! Congrats to them. It was a pleasure to work with them and we wish them success in their future carriers!

Publié le

Review on geo-inspired materials synthesis

State-of-the-art synthesis pathways to inorganic materials and nanomaterials are presented in the light of their relationship with geosciences, showing how geological phenomena can inspire innovative synthesis methods and materials.

Geoinspired syntheses of materials and nanomaterials, D. portehault*, I. Gómez-Recio, M. A. Baron, V. Musumeci, C. Aymonier, V. Rouchon, Y. Le Godec, Chemical Society Reviews, 51, 4828 (2022)

Publié le

Two papers on crystallization mechanisms

We have joined the efforts of Prof. Sylvie Begin-Colin and Prof. Ovidiu Ersen at IPCMS Strasbourg to shed more light on the processes at play during colloidal synthesis of iron oxide nanocrystals. In situ transmission electron microscopy reveals that molecular precursors self-assemble into vesicles, in which nanocrystals nucleate.

In situ liquid transmission electron microscopy reveals self-assembly-driven nucleation in radiolytic synthesis of iron oxide nanoparticles in organic media, N. Ortiz Peña, D. Ihiawakrim, S. Creţu, G. Cotin, C. Kiefer, S. Begin-Colin, C. Sanchez, D. Portehault, O. Ersen, Nanoscale, 14, 10950 (2022)

A Confinement‐Driven Nucleation Mechanism of Metal Oxide Nanoparticles Obtained via Thermal Decomposition in Organic Media, G. Cotin, B. Heinrich, F. Perton, C. Kiefer, G. Francius, D. Mertz, B. Freis, B. Pichon, J.‐M. Strub, S. Cianférani, N. Ortiz Peña, D. Ihiawakrim, D. Portehault, O. Ersen, A. Khammari, M. Picher, F. Banhart, C. Sanchez, S. Begin‐Colin, Small, 18, 2200414 (2022)

Publié le

Highlight from ILL

Our work where we used powder neutron diffraction to study Mn(V) oxide apatites with Universidad Complutense de Madrid has been highlighted by ILL!

The highlight is here

The original work: Hydroxyapatites as Versatile Inorganic Hosts of Unusual Pentavalent Manganese Cations, A. Varela, I. Gómez-Recio, L. Serrador, M. Hernando, E. Matesanz, A. Torres-Pardo, M. T. Fernández-Díaz, J. L. Martínez, F. Gonell, G. Rousse, C. Sanchez, C. Laberty-Robert, D. Portehault, J. M. González-Calbet, M. Parras, Chemistry of Materials, 32, 10584 (2020)

Publié le

Conference in Paris

We’ll have the pleasure to host, with Prof. Nathalie Vast (Ecole Polytechnique) and Jean-François Halet (NIMS-LINK), ISBB2022, the 21st International Symposium on Boron, Borides and related materials. The conference will be held in Jussieu campus, in Quartier Latin, in September 2022.

More details there: https://isbb2022.paris/

Publié le

New papers during last months

During the last months we have published some papers where we dig in several topics:

Chemistry of silicon-based nanomaterials, from Yang’s work:

Converting silicon nanoparticles into nickel iron silicide nanocrystals within molten salts for water oxidation electrocatalysis, Journal of Materials Chemistry A, 10, 1350 (2022)

A straightforward approach to high purity sodium silicide Na4Si4, Dalton Transactions, 50, 16703 (2021)

Combining nanoparticles with metallurgical processes to design new composites, from Binghua’s work:

Liquid Processing of Bismuth–Silica Nanoparticle/Aluminum Matrix Nanocomposites for Heat Storage Applications, ACS Applied Nano Materials, 5, 2, 1917 (2022)

Ultrasound-Assisted Liquid-Phase Synthesis and Mechanical Properties of Aluminum Matrix Nanocomposites Incorporating Boride Nanocrystals, Small, 18, 2104091 (2022)