Projektbeschreibung
Nachhaltige Katalysatoren auf Basis von Erdalkalimetallen
Im Stickstoffkreislauf werden oxidierte (NOx), neutrale (N2) und reduzierte (NH3) Stoffe durch ein kompliziertes Netzwerk von Prozessen von einer Form in die andere umgewandelt. Im Gegensatz dazu sind bei der Stickstoffmanipulation in der Industrie häufig Methoden der rohen Gewalt erforderlich. Das Haber-Bosch-Verfahren zur Umwandlung von N2 in NH3 stellt einen der energieintensivsten industriellen Prozesse dar. Das über die Marie-Skłodowska-Curie-Maßnahmen finanzierte Projekt NITRO-EARTH wird die metallorganische Chemie von Imido- [RN(2ˉ)] und Nitrido- [N(3ˉ)] Komplexen von Erdalkalimetallen, insbesondere Mg und Ca, untersuchen. Ziel ist es, eine neue Klasse von Erdalkalimetallkatalysatoren als nachhaltige Alternative zu Katalysatoren auf der Basis von Übergangsmetallen zu entwickeln.
Ziel
NITRO-EARTH is aiming to investigate the hardly explored nitrogen chemistry of the alkaline-earth metals (Ae) in order to disclose new reactivity and catalysis. In the biogeochemical nitrogen cycle oxidized (NOx), neutral (N2) and reduced (NH3) forms of N are interconverted by a complicated network of processes. In contrast, manipulation of N in industry is challenging and often needs brute-force methods. The Haber-Bosch process for N2-to-NH3 conversion is, despite being metal-catalysed, one of the most energy consuming industrial processes. This proposal focusses on the organometallic chemistry of imido [RN(2ˉ)] and nitrido [N(3ˉ)] complexes of the alkaline-earth metals, in particular Mg and Ca. While the amide (R2Nˉ) chemistry of the Ae metals is well-established, Ae-imido complexes are rare and Ae-nitrido compounds solely exist as insoluble salts, e.g. Mg3N2. Given the importance of imido and nitrido ligands in transition metal chemistry, access to soluble Ae=NR and Ae≡N complexes promises a rich reactivity and is the prelude of new catalytic processes based on abundant, generally biocompatible, alkaline-earth metals. The various pathways to reach the target include utilization of recently introduced, highly reducing Mg(0) complexes by HARDER and nitreones which have been investigated by PATEL. Also HARDER’s recently discovered N2 fixation with Ca will play a role in the synthetic approach. Owing to the highly ionic character and negative charge on N in Ae=NR or Ae≡N complexes, these novel complexes will be extremely potent nucleophiles or deprotonating reagents. This will be strongly dependent on nuclearity and aggregation which will be controlled by a library of bulky ligands currently available in the HARDER group. The work will be heavily supported by ab initio calculations. The project ultimately leads to the generation of a new class of alkaline-earth metal catalysts which may provide sustainable alternative for transition metal based catalysts.
Wissenschaftliches Gebiet
Schlüsselbegriffe
Programm/Programme
- HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA) Main Programme
Aufforderung zur Vorschlagseinreichung
Andere Projekte für diesen Aufruf anzeigenFinanzierungsplan
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European FellowshipsKoordinator
91054 Erlangen
Deutschland