College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China.
Laboratory of Quantum Photodynamics, Department of Chemistry, Lomonosov Moscow State University, Moscow, Russia.
Nat Commun. 2023 Jan 31;14(1):501. doi: 10.1038/s41467-023-36261-1.
Electrocatalytic reduction of carbon monoxide into fuels or chemicals with two or more carbons is very attractive due to their high energy density and economic value. Herein we demonstrate the synthesis of a hydrophobic Cu/CuO sheet catalyst with hydrophobic n-butylamine layer and its application in CO electroreduction. The CO reduction on this catalyst produces two or more carbon products with a Faradaic efficiency of 93.5% and partial current density of 151 mA cm at the potential of -0.70 V versus a reversible hydrogen electrode. A Faradaic efficiency of 68.8% and partial current density of 111 mA cm for ethanol were reached, which is very high in comparison to all previous reports of CO/CO electroreduction with a total current density higher than 10 mA cm. The as-prepared catalyst also showed impressive stability that the activity and selectivity for two or more carbon products could remain even after 100 operating hours. This work opens a way for efficient electrocatalytic conversion of CO/CO to liquid fuels.
由于具有高能量密度和经济价值，将一氧化碳电催化还原为两种或更多碳的燃料或化学品是非常有吸引力的。在此，我们展示了一种具有疏水性正丁胺层的疏水 Cu/CuO 片催化剂的合成及其在 CO 电还原中的应用。该催化剂上的 CO 还原生成两种或更多碳产物，在相对于可逆氢电极的-0.70 V 电位下，法拉第效率为 93.5%，部分电流密度为 151 mA·cm。达到了 68.8%的乙醇法拉第效率和 111 mA·cm 的部分电流密度，与所有之前关于 CO/CO 电还原的报告相比，这一电流密度要高得多，总电流密度高于 10 mA·cm。所制备的催化剂还表现出令人印象深刻的稳定性，即使经过 100 个工作小时，其对两种或更多碳产物的活性和选择性仍能保持不变。这项工作为 CO/CO 的高效电催化转化为液体燃料开辟了道路。
