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Electrochimie Moléculaire et Photochimie Redox


The EMPRe team conducts research in the field of molecular electrochemistry and redox photochemistry toward the understanding of bond activation trigerred by electron transfer. Within this framework, we are developing and analyzing electrochemical and photoinduced redox catalytic processes in homogeneous solution and on surfaces. Students in the EMPRe team are trained in synthesis of ligands, transition metal complexes or organic dyes. Then, they apply methods of molecular electrochemistry (cyclic voltammetry, electrolysis), spectroelectrochemistrysurface modification (electropolymerization, electrodeposition) to study mechanisms of electro/photo-catalytic processes. In this context, we are investigating in particular small molecules activation (such as H2O, CO2, N2O) as well as proton-coupled electron transfer processes... To provide a rational approach to mechanistic study and an inteligent design of molecular catalysts, we are developing kinetic and theoretical models related to cyclic voltammetry and electro-photo-catalytic processes.

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Permanent researchers

Sylvie Chardon (DR CNRS), Marie-Noëlle Collomb (DR CNRS), Cyrille Costentin (PR UGA), Jérôme Fortage (CR CNRS), Eric Saint-Aman (PR UGA)


2023 Innovation Prize from the Division Chimie Physique of the Société Chimique de France to Marie-Noëlle Collomb and her team

2023 Master 1 internship Prize from the Electrochemistry Subdivision of the Société Chimique de France awarded to Alexandra Collard

2022 Senior Researcher Prize from the Division Chimie Physique of the Société Chimique de France awarded to Cyrille Costentin


Research activities

Redox Behavior and Kinetics of Hydroxo Ligand Exchange on Iron Tetraphenylporphyrin: Comparison with Chloro Exchange and Consequences for its Role in Self-Modulation of Molecular Catalysis of Electrochemical Reactions.
C. Chartier, S. Chardon-Noblat, C. Costentin*
Inorg. Chem., 2024, accepted

Autonomous closed-loop mechanistic investigation of molecular electrochemistry via automation.
H. Sheng, J. Sun, O. Rodriguez, B. B. Hoar, W. Zhang, D. Xiang, T. Tang, A. Hazra, D. S. Min, A. G. Doyle, M. S. Sigman, C. Costentin, Q. Gu, J. Rodriguez-Lopez, C. Liu*
Nat. Commun., 2024, 15, 2781-2791

Turnover Number in Photoinduced Molecular Catalysis of Hydrogen Evolution: a Benchmarking of Catalysts?
J. Fortage, C. Costentin, M. N. Collomb, C. Costentin*
ChemSusChem, 2024, Advanced article

Enhancing the stability of photocatalytic systems for hydrogen evolution in water by using a tris-phenyl-phenanthroline sulfonate ruthenium photosensitizer.
F. Camara, J. S. Aguirre-Araque, J. Fortage*, M-N. Collomb*
Sustainable Energy Fuels, 2024, Advance article

Cyclic Voltammetry to Study Dynamics of Ion Insertion in Porous Materials.
C. Costentin*
Adv. Energy Sustainability Res., 2023, 2300242

Controlled Potential Electrolysis: Transition from Fast to Slow Regimes in Homogeneous Molecular Catalysis. Application to the Electroreduction of CO2 Catalyzed by Iron Porphyrin.
R. Deeba, A. Collard, C. Rollin, F. Molton, S. Chardon-Noblat, C. Costentin*
ChemElectroChem, 2023, e202300350

Hybrid catalyst to the rescue.
C. Costentin*
Nat. Synth., 2023

Importance of Ligand Exchange in the Modulation of Molecular Catalysis: Mechanism of the Electrochemical Reduction of Nitrous Oxide with Rhenium Bipyridyl Carbonyl Complexes.
R. Deeba, S. Chardon-Noblat*, C. Costentin*
ACS Catal., 2023, 13, 8262-8272

Deciphering Reversible Homogeneous Catalysis of the Electrochemical H2 Evolution and Oxidation: Role of Proton Relays and Local Concentration Effects.
B. Reuillard, C. Costentin*, V. Artero*
Angew. Chem. Int. Ed., 2023, e202302779

Disulfide radical anion as a super-reductant in biology and photoredox chemistry.
Q. Zhu*, C. Costentin, J. Stubbe, D. G. Nocera*
Chem. Sci., 2023, 14, 6876-6881

Enhanced activity for the oxygen reduction reaction in microporous water.
A. E. Thorarinsdottir, D. Erdosy, C. Costentin*, J. A. Mason*, D. G. Nocera*
Nat. Catal., 2023, 6, 425-434

Behavior of Iron Tetraphenylsulfonato Porphyrin Intercalated into LDH and LSH as Materials for Electrocatalytic Applications.
A. Tarhini, J. Aguirre-Araque, M. Guyot, C. Costentin, R. Rogez*, S. Chardon-Noblat*, V. Prevot, C. Mousty*
Electrocatalysis, 2023, 14, 111-120

Electrochemical properties of a Rhodium(III) mono-terpyridyl complex and use as a catalyst for light-driven hydrogen evolution in water.
F. Camara,T. Gavaggio B. Dautreppe, J. Chauvin, J. Pécaut, D. Aldakov, M.-N. Collomb*, J. Fortage*
Molecules, 2022, 27(19), 6614

Effect of Substituents Mimicking Anchorage of Rhenium Carbonyl Bipyridine Molecular Catalysts on CO2 Electroreduction
M. Guyot, M-N. Lalloz, J. S. Aguirre-Araque, G. Rogez, C. Costentin*, S. Chardon-Noblat*
Inorg. Chem., 2022, 61, 16072-16080

Electrochemical Mechanistic Analysis from Cyclic Voltammograms Based on Deep Learning.
B. B. Hoar, W. Zhang, S. Xu, R. Deeba, C. Costentin*, Q. Gu*, C.Liu*
ACS Meas. Sci. Au, 2022, 2, 55-604

Photochromic Metallopolymer Based on Dithienylethene as a Molecular Calculator.
E. Chatir, A. Khettabi, F. Lafolet, D. Jouvenot, G. Royal, E. Saint-Aman, S. Cobo*
Chem. Mater., 2022, 34, 5912-5918

Photoinduced Catalysis of Redox Reactions, Turnover Numbers, Turnover Frequency and Limiting Processes: Kinetic Analysis and Application to Light-Driven Hydrogen Production.
C. Costentin*, F. Camara, J. Fortage, M.-N. Collomb
ACS Catal.. 2022, 12, 6246-6254.

Proton Coupled Electron Transfer of Macrocyclic Ring Hydrogenation: The Chlorinphlorin.
R. Sun, M. Liu, S-L. Zheng, K. D. Dogutan*, C. Costentin*, D. G. Nocera*
Proc.Natl. Acad. Sci USA, 2022, 119, e2122063119

Photoredox Processes in the Aggregation and Gelation of Electron- Responsive Supramolecular Polymers Based on Viologens
C. Roizard, V. Andrieux, S. Al Shehimy, S. Chowdhury, Q. Reynard-Feytis, C. Kahlfuss, E. Saint-Aman, F. Chevallier, C. Bucher*, T. Gibaud*, D. Frath*
ECS Adv., 2022, 1, 020502

p-Block Metal-Oxide Noninnocence in the Oxygen Evolution Reaction in Acid: The Case of Bismuth Oxide.
A. E. Thorarinsdottir, C. Costentin, S. S. Veroneau, D. G. Nocera*
Chem. Mater., 2022, 34, 826-835

Publié le 21 mars 2018

Mis à jour le 22 avril 2024