Nanoengineered chiral Pt-Ir alloys for high-performance enantioselective electrosynthesis

Sopon Butcha (1) , Sunpet Assavapanumat , Somlak Ittisanronnachai , Veronique Lapeyre , Chularat Wattanakit , Alexander Kuhn (2)

1 ISM - Institut des Sciences Moléculaires
2 Bordeaux INP - Institut Polytechnique de Bordeaux

The design of efficient chiral catalysts is of crucial importance since it allows generating enantiomerically pure compounds. Tremendous efforts have been made over the past decades regarding the development of materials with enantioselective properties for various potential applications ranging from sensing to catalysis and separation. Recently, chiral features have been generated in mesoporous metals. Although these monometallic matrices show interesting enantioselectivity, they suffer from rather low stability, constituting an important roadblock for applications. Here, a straightforward strategy to circumvent this limitation by using nanostructured platinum-iridium alloys is presented. These materials can be successfully encoded with chiral information by co-electrodeposition from Pt and Ir salts in the simultaneous presence of a chiral compound and a lyotropic liquid crystal as asymmetric template and mesoporogen, respectively. The alloys enable a remarkable discrimination between chiral compounds and greatly improved enantioselectivity when used for asymmetric electrosynthesis (>95 %ee), combined with high electrochemical stability.

Domaines: Chimie

Sopon Butcha, Sunpet Assavapanumat, Somlak Ittisanronnachai, Veronique Lapeyre, Chularat Wattanakit, et al.. Nanoengineered chiral Pt-Ir alloys for high-performance enantioselective electrosynthesis. Nature Communications, 2021, 12 (1), pp.1314. ⟨10.1038/s41467-021-21603-8⟩. ⟨hal-03516659⟩