Gabriel Loget (Université de Bordeaux) donnera une conférence en anglais « Photoelectrodes: from Energy to Luminescence » en salle Marie Curie mercredi 11 décembre à 15h30.
Photoelectrodes: from Energy to Luminescence
Gabriel Loget
University of Bordeaux, Bordeaux INP, ISM, UMR CNRS 5255, 33607 Pessac, France.
gabriel.loget@cnrs.fr
Abstract
Photoelectrochemistry at semiconductors electrodes is a wide field of research that combines photon absorption and electrochemical charge transfer. The simultaneous occurrence of both these stimuli at the solid/liquid interface allows triggering electrochemical reactions with a considerably lowered energy input. So far, this phenomenon has been proven very promising for solar-to-fuel conversion applications (e.g., water splitting or CO2 reduction).[1] I will briefly present the recent progress of our group in the fabrication and the understanding of Si-based photoanodes with a particular focus on our recent developments in the area of urea oxidation reaction (UOR).[2]
On the other hand, electrochemiluminescence (ECL) is a light-emitting process and a powerful tool in analytical chemistry. This phenomenon is induced by the excited state of a luminophore, which is generated by an electrochemical reaction at an electrode surface.[3] Thus, photoelectrochemistry at semiconductors is a process where an electrode absorbs light, as opposed to ECL, where the electrode can be considered an emitter. We have recently explored the combination of these two concepts, which will be presented in the second part of this seminar.[4]
References
[1] a) K. Sun et al. Chem. Rev., 2014, 114, 8662. b) S. A. Lee et al. ACS Material Lett., 2020, 2, 1, 107. c) B. Fabre et al. Acc. Mater. Res. 2023, 4, 133.
[2] a) K. Oh et al. Energy Environ. Sci., 2018, 11, 2990. b) G. Loget et al. Nat. Commun., 2019, 10, 3522. c) P. Aroonratsameruang et al. J. Phys. Chem. C, 2020, 124, 25907. d) J. Dabboussi et al. J. Mater. Chem. A 2022, 10, 19769. e) J. Dabboussi et al. Curr. Opin. Electrochem. 2024, 101468. [3] a) Y. Zhao et al. Chem. Sci., 2022, 13, 2528. b) Y. Zhao, et al. Acc. Chem. Res. 2024, 57, 2144
[4] a) Y. Zhao et al. J. Am. Chem. Soc., 2019, 141, 13013. b) J. Yu et al. Angew. Chem. Int. Ed., 2020, 59, 15157. c) J. Yu et al. Electrochim. Acta, 2021, 381, 138238. d) Y. Zhao et al. Angew. Chem. Int. Ed.,2022, 61, e202201865. e) Y. Zhao et al. J. Am. Chem. Soc., 2023, 145, 17420.
f) Y. Zhao et al. ACS App. Mater. Interfaces 2024, 16, 11722.