L’électrochimiluminescence (ECL) est la génération de lumière par une réaction chimique électrogénérée. Elle implique l’application d’un potentiel à une électrode pour permettre un transfert de charge avec une solution. Pour cela, cet électrolyte doit contenir une espèce luminophore qui joue le rôle d’émetteur, accompagné dans la majorité des cas d...
The project focuses on the electrochemical reduction of CO2 with heterogeneous catalysts. Thanks to the "gas-fed flow cell" configuration developed in the group, high current densities can be achieved at moderate overpotentials. The first part of the project is more focused on the overall efficiency of the electrolyzer. To optimize it, we work to f...
La commercialisation des systèmes de piles à combustible à oxyde solide (SOFC) repose sur un équilibre entre leur coût de production, leurs performances et leur durabilité. Dans cette étude, le couplage des techniques de mise en forme par coulage en bande séquentiel et par sérigraphie, peu coûteux et adaptés à la production de masse, a été optimisé...
This PhD work focuses on understanding the mechanisms involved in cathodic protection (CP) in tidal zones (vertical zone between high tide and low tide levels). In 2015 a study by led by Ph. Refait et al. highlighted the unexpected persistence of CP even during emerged periods, which theoretically should not occur because of seawater withdrawal. Un...
New lamellar phases, named CIGSₙ, have been identified in the Cu₂S-In₂S₃-Ga₂S₃ system. These compounds exhibit a marked 2D character with a van der Waals gap (~ 3 Å). Their optical gap (1.7 - 1.9 eV) is comparable to that of the chalcopyrite Cu(In₀.₇Ga₀.₃)S₂, studied as an absorber in tandem solar cells. The CIGSₙ phases are isostructural of the co...
One of the “never thought of before” developments is the current advancement in the field of biotechnology. The revolutionary Brain Computer Interface (BCI) has paved the way for scientific researchers everywhere to help fight birth defects, traumatic loss of a limb, and/or motor function of a specific area. This Ph.D. manuscript presents the work ...
Solid oxide cells (SOC) are high-temperature (~750°C - 800°C) electrochemical converters that produce electricity (in fuel cell mode) or hydrogen (in electrolyzer mode). The challenge today is to lower the operating temperature by using new electrode materials in order to improve their lifetime while maintaining good electrochemical performance. To...
Ces dernières années, les oxydes moléculaires à base de vanadium ont montré leurs intérêts dans les dispositifs électrochimiques pour le stockage et la conversion de l'énergie en particulier. Toutefois, la littérature est peu abondante sur le développement de nouvelles méthodologies de synthèse pour la conception et l'étude de nouveaux systèmes red...
Graphene based materials have known a huge development in the last decade due to their outstanding mechanical and electrical properties. However there are still issues to overcome to take benefit of these promising developments. Among them, the control of inter-sheet interactions is crucial to improve the processing when one wants to obtain stable ...
This thesis project aims at studying the operation of electrochemical cells using integrated nuclear magnetic resonance systems combined with additive manufacturing technologies. Recent advances allow the development of a real time monitoring tool for the identification of the different molecular species and migrations generated during the operatio...
