We demonstrate the photocatalytic reduction of CO₂ into HCOOH using mesoporous Covalent Organic Framework (COF) as the active photocatalyst, Co(dmg)₂ as co-catalyst with Triethanolamine (TEOA) as sacrificial electron source under atmospheric pressure. Greater than 125 TON is achieved with 10 mg catalyst. The reaction cycle is dependent on the use of co-catalyst, Co(dmg)₂ and sacrificial electron donor (TEOA). The reaction does not occur in the absence of light (445 nm) and can readily be controlled by light intensity alternation. We also demonstrate that a TON of 36 can be obtained with use of sunlight using the catalytic cycle. These results open the door to an entirely new class of protocol for photocatalytic reduction of CO₂ using COF and Co(dmg)₂ as co-catalyst under visible light.

我们证明了在大气压力下，使用介孔共价有机骨架（COF）作为活性光催化剂，Co（dmg）₂作为助催化剂，三乙醇胺（TEOA）作为牺牲电子源，将CO ₂光催化还原为HCOOH 。用10毫克催化剂可达到125吨以上。反应周期取决于助催化剂Co（dmg）₂和牺牲电子供体（TEOA）的使用。该反应在不存在光（445 nm）的情况下不会发生，并且可以很容易地通过光强交替控制。我们还证明了使用催化循环在阳光下可以获得TON值为36。这些结果为光催化还原CO _2的全新方案打开了大门。在可见光下使用COF和Co（dmg）₂作为助催化剂。