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Benedikt Lassalle - Artificial Photosynthesis Research

Benedikt Lassalle is a chemist interested in artificial photosynthesis and particulary to the understanding of energy-related reactions using electrochemistry and X-ray spectroscopies. He is a scientist on the LUCIA beamline and in charge of the Microfluidics Lab at the SOLEIL Synchrotron on the Paris-Saclay campus.


Short Bio.

Benedikt was trained as a chemist at the Université de Strasbourg and Université d'Aix-Marseille, France. He obtained his PhD in inorganic chemistry in 2008 at the Institut de Chimie Moléculaire et des Matériaux d'Orsay, under the guidance of Dr. Elodie Anxolabéhère-Mallart and Pr. Ally Aukauloo. His thesis was focused on the synthesis and characterization of biomimetic highly-valent manganese complexes, as intermediate models for the water oxidation reaction in Photosystem II (PS II). He then spent a year as a post-doc at the Commissariat à l'Energie Atomique in Saclay, where he worked on the electrochemistry of PS II in the team of Dr. A. Bill Rutherford. In 2009, He moved on to the Lawrence Berkeley National Laboratory in the team of Drs. Vittal Yachandra and Junko Yano, where he spent three years as a post-doc. He worked both on the study of PS II and related model complexes using X-ray spectroscopy at synchrotrons and free electron lasers and on the in situ/operando study of electrocatalysts for water splitting. In 2014, he became a beamline scientist on the LUCIA beamline at SOLEIL and has been since then continuing his work on the  study of electrocatalysts under operating conditions in collaboration with several teams in France and throughout the world. Since 2015, he has been appointed at the head of the microfluidics Laboratory of SOLEIL, where he is combining microfluidic techniques with spectroscopy and  energy-related electrocatalysis.


Research projects.

In Situ/Operando spectroscopy of water-splitting electrocatalysts. We use X-ray absorption and emission spectroscopies to study the structure of nanocatalysts under oxygen and hydrogen evolving electrocatalytic conditions (OER and HER, respectively). We have been interested in the study of transition metal oxides (OER), molybdenum sulfides (HER) as well as transition metal borides. In collaboration with the team of Pr. Ovidiu Ersen, Université de Strasbourg and Dr. David Portehault, Sorbonne Université, this project has been recently funded by an ANR project (InSiChem).

Time-resolved spectroscopic studies of CO2-reducing electrocatalysts. We are interested in understanding the local and electronic structure of transition metal electrocatalysts that are active for the reduction of CO2 into valuable chemicals. These studies require the development of specific techniques and methodologies that allow coupling time-resolved X-ray absorption and emission spectroscopies with electrocatalytic processes. This project is run in collaboration with the teams of Zakaria Halime, Université Paris-Sud and Pr. Marc Robert, Université Paris Diderot, and has been funded by the Charmmmat and Michem LABEX, respectively.

Microfluidic devices for the sequential reduction of CO2 into valuable chemicals. We have recently started a project where sequential microfluidic reactors are implemented with CO2 reduction catalysts, thus allowing complex synthetic sequences. This project was funded by a young researcher ANR grant (MF-CO2).

Microfluidic devices for the study of transient protein assemblies using cryo-EM. We collaborate with the team of Dr. Yves Mechulam at the Ecole Polytechnique for the development of microfluidic mixers and time-controlled sample delivery onto cryo-EM grids. These methodological developments are applied to the study of the RNA translation initiation process and have been funded by the TREMTI ANR project.



• 42 articles in peer-reviewed journals

• h-index: 21

Full article list can be found here: Google Scholars  ResearcherID


Journal articles10 documents

  • Mateusz Odziomek, Mounib Bahri, Cédric Boissière, Clément Sanchez, Benedikt Lassalle-Kaiser, et al.. Aerosol synthesis of thermally stable porous noble metals and alloys by using bi-functional templates. Materials Horizons, cRoyal Society of Chemistry, 2020, 7 (2), pp.541-550. ⟨10.1039/C9MH01408J⟩. ⟨hal-02617368⟩
  • Suhail Usmani, Mirko Mikolasek, Angélique Gillet, José Sánchez Costa, Mathilde Rigoulet, et al.. Spin crossover in Fe(triazole)–Pt nanoparticle self-assembly structured at the sub-5 nm scale. Nanoscale, Royal Society of Chemistry, 2020, 12 (15), pp.8180-8187. ⟨10.1039/d0nr02154g⟩. ⟨hal-02570895⟩
  • Nathaly Ortiz Peña, Dris Ihiawakrim, Madeleine Han, Benedikt Lassalle-Kaiser, Sophie Carenco, et al.. Morphological and Structural Evolution of Co3O4 Nanoparticles Revealed by in Situ Electrochemical Transmission Electron Microscopy during Electrocatalytic Water Oxidation. ACS Nano, American Chemical Society, 2019, 13 (10), pp.11372-11381. ⟨10.1021/acsnano.9b04745⟩. ⟨hal-02342909⟩
  • Camille Rivard, Laurie Amenc, Samia Benlahrech, Bouchra Makoudi, Mustapha Teffahi, et al.. Synchrotron micro-X-ray fluorescence shows sulfur accumulation in the middle cortex of N2-fixing legume nodules. Protoplasma, Springer Verlag, 2019, 256 (4), pp.1025-1035. ⟨10.1007/s00709-019-01360-8⟩. ⟨hal-02617612⟩
  • Khaled Cheaib, Baptiste Maurice, Tiphaine Mateo, Zakaria Halime, Benedikt Lassalle-Kaiser. Time-resolved X-ray absorption spectroelectrochemistry of redox active species in solution. Journal of Synchrotron Radiation, International Union of Crystallography, 2019, 26 (6), pp.1980-1985. ⟨10.1107/S1600577519013614⟩. ⟨hal-02385904⟩
  • Grégoire Paille, Maria Gomez-Mingot, Catherine Roch-Marchal, Benedikt Lassalle-Kaiser, Pierre Mialane, et al.. A Fully Noble Metal-Free Photosystem Based on Cobalt- Polyoxometalates Immobilized in a Porphyrinic Metal- Organic-Framework for Water Oxidation. Journal of the American Chemical Society, American Chemical Society, 2018, ⟨10.1021/jacs.7b11788⟩. ⟨hal-02081087⟩
  • Kiseok Oh, Cristelle Mériadec, Benedikt Lassalle-Kaiser, Vincent Dorcet, Bruno Fabre, et al.. Elucidating the performance and unexpected stability of partially coated water-splitting silicon photoanodes. Energy & Environmental Science, Royal Society of Chemistry, 2018, 11 (9), pp.2590-2599. ⟨10.1039/c8ee00980e⟩. ⟨hal-01900872⟩
  • Clément Larquet, Anh-Minh Nguyen, Mario Ávila-Gutiérrez, Lionel Tinat, Benedikt Lassalle-Kaiser, et al.. Synthesis of Ce 2 O 2 S and Gd 2(1– y ) Ce 2 y O 2 S Nanoparticles and Reactivity from in Situ X-ray Absorption Spectroscopy and X-ray Photoelectron Spectroscopy. Inorganic Chemistry, American Chemical Society, 2017, ⟨10.1021/acs.inorgchem.7b02336⟩. ⟨hal-01635618⟩
  • Sanae El Ghachtouli, H. Vincent Ching, Benedikt Lassalle-Kaiser, Régis Guillot, Domenick Leto, et al.. Electrochemical formation of MnIII-peroxo complexes supported by pentadentate amino pyridine and imidazole ligands. Chemical Communications, Royal Society of Chemistry, 2013, 49 (50), pp.5696. ⟨10.1039/c3cc41300d⟩. ⟨hal-02888064⟩
  • Sanae El Ghachtouli, Benedikt Lassalle-Kaiser, Pierre Dorlet, Régis Guillot, Elodie Anxolabéhère-Mallart, et al.. Implications of remote water molecules on the electron transfer coupled processes at a nonporphyrinic Mn(iii)-hydroxido complex. Energy & Environmental Science, Royal Society of Chemistry, 2011, 4 (6), pp.2041. ⟨10.1039/c1ee01078f⟩. ⟨hal-02887954⟩

Theses1 document

  • Benedikt Lassalle Kaiser. Activation d'une molécule d'eau coordonnée au manganèse : quatre études de cas.. Sciences du Vivant [q-bio]. Université Paris Sud - Paris XI, 2008. Français. ⟨tel-00555025⟩

Habilitation à diriger des recherches1 document

  • Benedikt Lassalle-Kaiser. Spectroscopic tools for the study of natural and artificial photosynthetic catalysts. Chemical Sciences. Université Paris-Sud Orsay, 2019. ⟨tel-02542757⟩