Catégorie : Non classé

Our own Carlos is leaving the team after 2 years! Wishing him nice discoveries in his new postdoc stay @Marc Fontecave’s group at Collège de France!

We are honored to provide two contributions to the special virtual issue that Chemistry of Materials is launching in honor of Professor Clément Sanchez, who has been, and still is, so influential to our work:

Galvanic Replacement and Etching of MAX-Related Phases in Molten Salts toward MXenes: An In Situ Study, E. Defoy, M. Baron, A. Séné, A. Ghoridi, D. Thiaudière, S. Célérier, P. Chartier, F. Brette, V. Mauchamp, D. Portehault*, Chemistry of Materials, 35, 19, 8112–8121 (2023).

This is the firt report of combined in situ XRD and in situ XAS to probe reaction mechanisms in molten salts. This is also our first forey into galvanic reactions in molten salts, and into the chemistry of MAX phases (layered carbides and nitrides) within molten salts. Nice collaboration with SOLEIL synchrotron and IC2MP from Poitiers.

This work is a joint contribution to the special issue between José M. González-Calbet at UC Madrid and David. It deals with heterostructures derived from chimie douce, in water, to adjust metal-support interactions by using a new crystal structure of tungsten oxide as oxde support. Nice work of Isabel, in collaboration with LRS lab from Sorbonne Université.

Metal–Support Interactions in Pt-WO₃ Heterostructures: Role of WO₃ Polymorphism, I. Gómez-Recio, C. Thomas, C. Méthivier, M. L. Ruiz-González, J. M. González-Calbet*, D. Portehault*, Chemistry of Materials, 35, 19, 7931–7942 (2023).

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)

We have two postdoc positions to fill. Please, visit the join us page!

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

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

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

The group has evolved quite a lot over the last months. We wish a lot of success for the future to Guillaume and Yang who have brilliantly defended their thesis!

And… we welcome the new generation who arrived during the last weeks: Marzena is a new postdoc, geoscientist and interesting in structural transformations in nanomaterials, Emile is master student working on layered materials, Ambroise deals with perovskite oxide nanocatalysts, and Daniel is PhD candidate at Universidad Complutense de Madrid, visiting us for 2 months for nanoscale oxide synthesis.

David has made several free-to-access recorded seminars in 2022 and late 2021:

The first one (in French) at Collège de France, where he was invited by Prof. J.-M. Tarascon as part of his lectures:

The second one (in English) for The EuChemS Lecture Award. At the end of this one, Yang and Fernando have been invited to give short talks on their own works:

We are looking for new members, PhDs and postdoc, to join the group. Details and formal applications can be found at the following links:

https://bit.ly/3y3NSn0

https://bit.ly/33h5cXk

https://bit.ly/3nPeHXk