电化学
电解质
化学工程
催化作用
吸附
多孔性
材料科学
扩散
化学
纳米技术
有机化学
电极
复合材料
物理化学
工程类
物理
热力学
作者
Chunjun Chen,Xupeng Yan,Yahui Wu,Shoujie Liu,Xiudong Zhang,Xiaofu Sun,Qinggong Zhu,Haihong Wu,Buxing Han
标识
DOI:10.1002/anie.202202607
摘要
Electroreduction of CO2 into valuable fuels and feedstocks offers a promising way for CO2 utilization. However, the commercialization is limited by the low productivity. Here, we report a strategy to enhance the productivity of CO2 electroreduction by improving diffusion of CO2 to the surface of catalysts using porous organic cages (POCs) as an additive. It was noted that the Faradaic efficiency (FE) of C2+ products could reach 76.1 % with a current density of 1.7 A cm-2 when Cu-nanorod(nr)/CC3 (one of the POCs) was used, which were much higher than that using Cu-nr. Detailed studies demonstrated that the hydrophobic pores of CC3 can adsorb a large amount of CO2 for the reaction, and the diffusion of CO2 in the CC3 to the nanocatalyst surface is easier than that in the liquid electrolyte. Thus, more CO2 molecules make contact with the nanocatalysts in the presence of CC3, enhancing CO2 reduction and inhibiting generation of H2 .
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