Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 29, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202957
Keywords
Electrochemistry; Interphases; Ionic Liquids; Reaction Mechanisms; Solid Catalyst with Ionic Liquid Layer
Categories
Funding
- Deutsche Forschungsgemeinschaft (DFG) [SFB 1452, 431791331, 322419553, 453560721]
- German Federal ministry of Education and Research (BMBF) [05K19WE1]
- Bavarian ministry of Economic Affairs, Regional Development and Energy
- China Scholarship Council (CSC)
- Projekt DEAL
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The solid catalyst with ionic liquid layer (SCILL) is a successful concept in heterogeneous catalysis and electrocatalysis for selective transformation of organic compounds.
The solid catalyst with ionic liquid layer (SCILL) is an extremely successful new concept in heterogeneous catalysis. The idea is to boost the selectivity of a catalyst by its modification with an ionic liquid (IL). Here, we show that it is possible to use the same concept in electrocatalysis for the selective transformation of organic compounds. We scrutinize the electrooxidation of 2,3-butanediol, a reaction which yields two products, singly oxidized acetoin and doubly oxidized diacetyl. When adding the IL (1-ethyl-3-methyl-imidazolium trifluormethanesulfonate, [C(2)C(1)Im][OTf]), the selectivity for acetoin increases drastically. By in situ spectroscopy, we analyze the underlying mechanism: Specific adsorption of the IL anions suppresses the activation of water for the second oxidation step and, thus, enhances the selectivity for acetoin. Our study demonstrates the great potential of this approach for selective transformation of organic compounds.
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