Advanced nanoparticles and methodologies
Last picnic on the campus for the team. It was great to host Paul for Julia Zaikina’s group (Iowa, USA), and our master students : Timothé from ENS Lyon, and Mihai from Gröningen university. Farewell to Paul back in the US (but continuing collaboration) and Mihai who will start his PhD in Loredana Protesescu’s group at Gröningen Uni. Hopefully new things coming on boron-based nanomaterials. Timothé continues in the team as PhD student.
Great recognition for Paul Oftedahl from Julia Zaikina’s group at Iowa State University, who received the best poster award at the 23rd International Symposium on Boron, Borides and Related Materials, Riversides (CA), for the work that he performed in collaboration with our team. Paul stayed in our Paris team for 6 months and developed electrocatalytic studies on borides. We are thankful for the French Ambassy in the USA for granting a Chateaubriand fellowship to Paul to make his stay possible.
We have a new doctor from the team! Congratulations Natalia for the very nice defense and the challenging work. Again a great at the interface of chemistry and high-pressure physics co-supervised with my colleague Yann Le Godec.
We have looking for Ph.D. candidates and a postdoctoral fellow! If interested, please contact david.portehault[at]sorbonne-universite.fr :
Open position for a doctoral school application:
Open position, already funded, for materials discovery assisted by artificial intelligence, in the frame of PEPR-DIADEM MADNESS project:
We are looking for candidates willing to engage in an application for an MSCA fellowship. The team has experience in such applications (successful application in 2024 for an incoming postdoctoral fellow), and sorbonne University provides close support and training for the application (details here and here ):
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!
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)
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)
