Boosting CO2 electroreduction performance over fullerene-modified MOF-545-Co promoted by π–π interaction

• Published in: Chinese chemical letters 2023-04, Vol.34 (4), p.107459, Article 107459
• Main Authors: Dong, Xue, Xin, Zhifeng, He, Dong, Zhang, Jia-Ling, Lan, Ya-Qian, Zhang, Qian-Feng, Chen, Yifa
• Format: Article
• Language: English
• Subjects: CO2RR; Electrocatalytic performance; Fullerene; Metal organic framework; π-π interaction
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2022.04.057

Metal-organic frameworks (MOFs) have showed high promise in CO2-electroreduction, yet their generally insufficient conductivity or low electron-transfer efficiency have largely restricted the wide-spread applications. Herein, fullerene molecules (i.e., C60 and C70) have been successfully introduced into the pore-channels of a Co-porphyrin based MOF through a facile strategy. Thus-obtained hybrid materials present higher electron-transfer ability, enhanced CO2 adsorption-enthalpy and CO2 electroreduction activity. Notably, the charge transfer resistance (Rct) of C60@MOF-545-Co is almost 5 times lower of than that of MOF-545-Co, as well as 1.5 times increased for the CO2 adsorption enthalpy. As expect, the FECO of C60@MOF-545-Co (97.0%) is largely higher than MOF-545-Co (70.2%), C60@MOF-545 (19.4%), C60 (11.5%) and physical mixture (70.3%) and presented as one of the best CO2 electroreduction catalysts reported in H-cell system. The facile strategy would give rise to new insight into the exploration of powerful MOF-based hybrid materials in high-efficiency CO2 electroreduction. Fullerene is successfully introduced into the channels of MOF-545-Co through an impregnation method and the introducing of C60 largely increases the electrocatalytic performance of MOF material for CO2RR. [Display omitted]