Description du projet
Des applications énergétiques plus propres
Les réseaux métallo-organiques (MOF pour Metal-organic frameworks) sont des matériaux cristallins extrêmement poreux qui contiennent des réseaux d’ions métalliques chargés positivement. Leurs propriétés leur permettent d’être utilisés à des fins catalytiques pour produire de l’énergie propre. Financé par le Conseil européen de la recherche, le projet Supramol entend améliorer les performances catalytiques des MOF en modifiant leur taille, leur forme et leur charge. Les chercheurs incorporeront également des groupes fonctionnels et des photosensibilisateurs pour permettre l’absorption de la lumière, ce qui déclenchera des transferts d’électrons et activera les centres catalytiques. Leur objectif ultime consiste à réaliser une conversion efficace de la lumière en énergie chimique, ce qui constituerait une percée scientifique de taille dont les répercussions seraient inestimables pour les générations futures.
Objectif
Metal-organic frameworks (MOFs) are key compounds related to energy storage and conversion, as their unprecedented surface areas make them promising materials for gas storage and catalysis purposes. We believe that their modular construction principles allow the replication of key features of natural enzymes thus demonstrating how cavity size, shape, charge and functional group availability influence the performances in catalytic reactions. This proposal addresses the question of how such novel, bio-inspired metallo-supramolecular systems can be prepared and exploited for sustainable energy applications. A scientific breakthrough that demonstrates the efficient conversion of light into chemical energy would be one of the greatest scientific achievements with unprecedented impact to future generations. We focus on the following key aspects:
a) MOFs containing novel, catalytically active complexes with labile coordination sites will be synthesised using rigid organic ligands that allow us to control the topologies, cavity sizes and surface areas. We will incorporate photosensitizers to develop robust porous MOFs in which light-absorption initiates electron-transfer events that lead to the activation of a catalytic centre. In addition, photoactive molecules will serve as addressable ligands whereby reversible, photo-induced structural transformations impose changes to porosity and chemical attributes at the active sites.
b) Catalytic studies will focus on important oxidations of alkenes and alcohols. These reactions are relevant to H2-based energy concepts as the anodic liberation of protons and electrons can be coupled to their cathodic recombination to produce H2. The studies will provide proof-of-concept for the development of photocatalytic systems for the highly endergonic H2O oxidation reaction that will be explored using most stable MOFs. Further, gas storage and magnetic properties that may also be influenced by light-irradiation will be analysed.
Champ scientifique
- natural scienceschemical sciencesinorganic chemistryinorganic compounds
- natural scienceschemical scienceselectrochemistryelectrolysis
- natural scienceschemical sciencesorganic chemistryalcohols
- natural scienceschemical sciencescatalysis
- natural sciencesbiological sciencesbiochemistrybiomoleculesproteinsenzymes
Programme(s)
Régime de financement
ERC-COG - Consolidator GrantInstitution d’accueil
D02 CX56 DUBLIN 2
Irlande