Integrated capture and solar-driven utilization of CO2 from flue gas and air
Integrated capture and solar-driven utilization of CO2 from flue gas and air
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DOI：
10.1016/j.joule.2023.05.022
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发表时间：
2023-07-19
期刊：
影响因子：
39.8
通讯作者：
Reisner, Erwin
中科院分区：
文献类型：
--
作者：
Kar, Sayan;Rahaman, Motiar;Reisner, Erwin
将碳捕获与利用技术相结合，可以为未来的净零碳经济铺平道路。然而，由于其热力学稳定性，化学捕获的CO2的直接转化仍然具有挑战性。在这里，我们展示了从烟道气或空气中捕获CO2，并使用太阳辐射将其直接转化为合成气，而无需任何外部施加电压。该系统用胺/氢氧化物溶液捕获CO2，并使用含有固定化分子钴酞菁催化剂的钙钛矿基光电阴极将其光电化学转化为合成气（CO：H2 1：2 [从浓缩CO2捕获]，1：4 [从模拟烟道气捕获]和1：30 [从空气捕获]）。在阳极处，塑料衍生的乙二醇在Cu 26 Pd 74合金催化剂上被氧化成乙醇酸。整个过程使用烟道气或空气作为碳源，废弃的塑料废物作为电子供体，阳光作为唯一的能量输入。这一战略为未来的碳中和甚至负太阳能燃料和废物升级回收技术开辟了新的途径。
Integration of carbon capture with utilization technologies can lead the way to a future net-zero carbon economy. Nevertheless, direct conversion of chemically captured CO2 remains challenging due to its thermodynamic stability. Here, we demonstrate CO2 capture from flue gas or air and its direct conversion into syngas using solar irradiation without any externally applied voltage. The system captures CO2 with an amine/hydroxide solution and photoelectrochemically converts it into syngas (CO:H2 1:2 [captured from concentrated CO2], 1:4 [from simulated flue gas], and 1:30 [from air]) using a perovskite-based photocathode containing an immobilized molecular Co-phthalocyanine catalyst. At the anode, plastic-derived ethylene glycol is oxidized into glycolic acid over a Cu26Pd74 alloy catalyst. The overall process uses flue gas or air as carbon source, discarded plastic waste as an electron donor, and sunlight as the sole energy input. This strategy opens new avenues for future carbon-neutral or even negative solar fuel and waste upcycling technologies.