Tian Yangming, Fei Xiang, Ning Hui, Wang Wenhang, Tan Xiaojie, Wang Xiaoshan, Ma Zhengguang, Guo Zhihao, Wu Mingbo
College of Chemical Engineering, College of New Energy, Institute of New Energy, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, china.
Front Chem. 2022 Jun 8;10:915759. doi: 10.3389/fchem.2022.915759. eCollection 2022.
Carbon dioxide electroreduction (CORR) with renewable energy is of great significance to realize carbon neutralization. Traditional electrolysis devices usually need an ion exchange membrane to eliminate the interference of oxygen generated on the anode. Herein, the novel CuO/CeO composite was facilely prepared by anchoring small CuO nanoparticles on the surface of CeO nanocubes. In addition, CuO(002) crystal planes were induced to grow on CeO(200), which was preferable for CO adsorption and C-C bond formation. As the catalyst in a membrane-free cell for CORR, the Cu was stabilized due to strong interactions between copper and ceria to resist the reduction of negative potentials and the oxidation of oxygen from the counter electrode. As a result, a high Faradaic efficiency of 62.2% toward C products (ethylene and ethanol) was achieved for the first time in the membrane-free conditions. This work may set off a new upsurge to drive the industrial application of CORR through membrane-free electrocatalysis.
利用可再生能源进行二氧化碳电还原（CORR）对于实现碳中和具有重要意义。传统的电解装置通常需要离子交换膜来消除阳极产生的氧气的干扰。在此，通过将小的CuO纳米颗粒锚定在CeO纳米立方体表面，简便地制备了新型CuO/CeO复合材料。此外，诱导CuO(002)晶面在CeO(200)上生长，这有利于CO吸附和C-C键形成。作为用于CORR的无膜电池中的催化剂，由于铜与二氧化铈之间的强相互作用，铜得以稳定，从而抵抗负电位的还原和对电极氧气的氧化。结果，在无膜条件下首次实现了对C产物（乙烯和乙醇）62.2%的高法拉第效率。这项工作可能会掀起一股新的热潮，通过无膜电催化推动CORR的工业应用。
