The photochemical reduction of CO₂ to chemical resources has displayed the promise to solve energy and environmental problems. To facilitate this reaction, a considerable challenge is to design not only highly efficient and selective, but also economic catalysts. In this study, we report a homogeneous catalyst, [CoL¹(CH₃CN)](ClO₄)₂ (1, L¹=Tris[2‐(iso‐propylamino)ethyl]amine) which displays high activity and selectivity for CO₂ reduction to CO driven by visible light in a water‐containing system, with turnover numbers (TON_CO) and turnover frequencies (TOF), and CO selectivity values of 44800, 1.24 s⁻¹ and 97 %, respectively. The excellent performances of 1 for the photocatalytic CO₂‐to‐CO conversion is confirmed by control experiments and its catalytic mechanism is corroborated by DFT calculations.

中文翻译：

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Co（II）均相催化剂在H2O / CH3CN溶液中进行高效，选择性的可见光驱动的CO2转化为CO

将CO ₂光化学还原为化学资源已显示出解决能源和环境问题的希望。为了促进该反应，一个巨大的挑战是不仅要设计高效和选择性的，而且要设计经济的催化剂。在这项研究中，我们报告的均相催化剂，[COL ¹（CH ₃ CN）]（CLO ₄）₂（1，L ¹ =三[2-（异丙基氨基）乙基]胺），其显示高的活性和选择性在水系统中，由可见光将CO ₂还原为CO，并具有周转数（TON _CO）和周转频率（TOF），以及CO选择性值分别为44800、1.24 s ^-1和97％。对照实验证实了1对光催化CO ₂到CO转化的优异性能，其催化机理已通过DFT计算得到证实。