Achieving selective photocatalytic conversion of CO₂ in an aqueous solution is challenging owing to the generation of hydrogen as a typical by-product. Herein, a visible light-driven CO₂ conversion system was developed using Co(bpy)₂Cl₂ as the catalyst and Acriflavine (Acr) as the photosensitizer (PS). At the optimal ratio, under visible light irradiation, the system achieved high selective CO₂ conversion to CO (∼100 %) in an aqueous acetonitrile solution, with a turnover number (TON) of 100 and a maximal turnover frequency (TOF) of 90 h⁻¹. Deeply studies reveal that the -NH₂ of Acr plays a vital effect on the selectivity of this photocatalytic CO₂ conversion system. The unique combination of Co(bpy)₂Cl₂ and Acr provides an ideal platform for designing highly selective photocatalytic systems for CO₂ reduction.

由于氢的产生是典型的副产物，因此在水溶液中实现CO _2的选择性光催化转化具有挑战性。在此，使用Co（bpy）₂ Cl ₂作为催化剂并且使用A啶黄（Acr）作为光敏剂（PS）开发了可见光驱动的CO ₂转化系统。在最佳比例下，在可见光照射下，该系统在乙腈水溶液中实现了高选择性的CO ₂转化为CO（〜100％），周转数（TON）为100，最大周转频率（TOF）为90 h ^-1。深入的研究表明，Acr的-NH ₂对这种光催化CO的选择性起着至关重要的作用₂转换系统。Co（bpy）₂ Cl ₂和Acr的独特结合为设计用于CO ₂还原的高选择性光催化系统提供了理想的平台。