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A Highly Active N‐Heterocyclic Carbene Manganese(I) Complex for Selective Electrocatalytic CO 2 Reduction to CO
Author(s) -
Franco Federico,
Pinto Mara F.,
Royo Beatriz,
LloretFillol Julio
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201800705
Subject(s) - manganese , anhydrous , catalysis , cyclic voltammetry , chemistry , carbene , faraday efficiency , medicinal chemistry , inorganic chemistry , electrocatalyst , organometallic chemistry , electrochemistry , organic chemistry , electrode
We report here the first purely organometallic fac ‐[Mn I (CO) 3 (bis‐ Me NHC)Br] complex with unprecedented activity for the selective electrocatalytic reduction of CO 2 to CO, exceeding 100 turnovers with excellent faradaic yields ( η CO ≈95 %) in anhydrous CH 3 CN. Under the same conditions, a maximum turnover frequency (TOF max ) of 2100 s −1 was measured by cyclic voltammetry, which clearly exceeds the values reported for other manganese‐based catalysts. Moreover, the addition of water leads to the highest TOF max value (ca. 320 000 s −1 ) ever reported for a manganese‐based catalyst. A Mn I tetracarbonyl intermediate was detected under catalytic conditions for the first time.