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A Highly Active N‐Heterocyclic Carbene Manganese(I) Complex for Selective Electrocatalytic CO2 Reduction to CO

机译:用于选择性电催化将CO2还原为CO的高活性N-杂环碳锰(I)配合物

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摘要

We report here the first purely organometallic fac‐[MnI(CO)3(bis‐MeNHC)Br] complex with unprecedented activity for the selective electrocatalytic reduction of CO2 to CO, exceeding 100 turnovers with excellent faradaic yields (η CO≈95 %) in anhydrous CH3CN. Under the same conditions, a maximum turnover frequency (TOFmax) 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 TOFmax value (ca. 320 000 s−1) ever reported for a manganese‐based catalyst. A MnI tetracarbonyl intermediate was detected under catalytic conditions for the first time.
机译:我们在这里报告的第一个纯有机金属fac- [Mn I (CO)3(bis- Me NHC)Br]络合物具有前所未有的活性,可以选择性地电催化还原CO2为在无水CH3CN中,CO超过100个营业额,具有出色的法拉第收率(ηCO≈95%)。在相同条件下,通过循环伏安法测得的最大周转频率(TOFmax)为2100 s -1 ,明显超过了其他锰基催化剂的报告值。此外,添加水导致锰基催化剂有史以来最高的TOFmax值(约320 000 s -1 )。首次在催化条件下检测到Mn I 四羰基中间体。

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