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Chimie de la Matière Condensée de Paris

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Stages 2014 niveau MASTER 2

Consultez la liste des sujets de stages proposés par les équipes du LCMCP (UMPC-CDF)
 
A la Une
Chaire "Chimie des matériaux hybrides" du Collège de france


COURS CS CDF
Programme des cours et séminaires 2014-2015

Séminaires internes
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Jeudi 04/05/2015 (11h - Salle D2, Collège de France)

Hubert H. Girault

Ecole Polytechnique Fédérale de Lausanne

Redox catalysis for water splitting and CO2 reduction

Abstract: First, I shall present our demonstrator plant for the production of hydrogen using a commercial vanadium redox battery (10 kW installed, 200kW in preparation). The process is based on the redox catalysis of protons by vanadium (II) outside the battery in an external circuit comprising a catalytic bed of Mo2C on ceramic. The physico-chemical principal of redox catalysis on metallic nanoparticles will be discussed.
Then, I shall present our “dream” project of batch water splitting using biphasic systems. The idea is to use two biphasic water/oil systems. In both
systems, we place in the oil phase an electron D and an electron acceptor A. In system 1, we have a catalyst for proton reduction and in system 2 one catalyst for water oxidation. Under day light, system 1 produces hydrogen and the donor is oxidised and system 2 produces oxygen and the acceptor is reduced. At night, the two oil phases are mixed to reset the redox couples. This membraneless approach provides a means to generate H2 and O2 separately.
Thirdly, I shall present our work on photo-ionic cells to convert solar energy and to generate electricity on demand. The concept is also based on a biphasic system. We place for example a cationic dye in water together with a redox quencher. Upon photo reaction, the neutral reduced dye is extracted to the organic phase. The two phases are then separated and the energy is then stored as redox energy. To recover this energy, we pass the two solutions in an electrochemical flow cell to generate electricity on demand.
Finally, I shall present our work on CO2 reduction using super critical CO2. First, I shall present the photoreduction of CO2 at the water/sc CO2 interface and then present our electrochemical investigations of CO2 reduction in scCO2-solvent mixtures using metal-organic catalysts. 

 
Focus sur ...
Une publication de l'équipe "Matériaux et Biologie"

Une publication à Nature Communications, en collaboration avec le Laboratoire d'Optique et Biosciences, mise à l'honneur sur le site de l'INP du CNRS :

"Mesurer optiquement le diamètre des fibrilles de collagène"
Prix ENI 2014

Clément Sanchez a reçu le prix ENI 2014
, section protection de l'environnement.

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