离子液体
丙酮
选择性
化学
催化作用
电催化剂
无机化学
多相催化
吸附
组合化学
离子键合
反应机理
有机化学
电化学
离子
电极
物理化学
发酵
作者
Tian Yang,Juntao Yang,Xin Deng,Evanie Franz,Lukas Fromm,Nicola Taccardi,Zhi Li,Andreas Görling,Peter Wasserscheid,Olaf Brummel,Jörg Libuda
标识
DOI:10.1002/anie.202202957
摘要
Abstract 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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