Implanting Polypyrrole in Metal-Porphyrin MOFs: Enhanced Electrocatalytic Performance for CO2RR

Zhifeng Xin; Jingjing Liu; Xinjian Wang; Kejing Shen; Zibo Yuan; Yifa Chen; Ya-Qian Lan

doi:10.1021/acsami.1c15187

Implanting Polypyrrole in Metal-Porphyrin MOFs: Enhanced Electrocatalytic Performance for CO₂RR

ACS Appl Mater Interfaces. 2021 Nov 24;13(46):54959-54966. doi: 10.1021/acsami.1c15187. Epub 2021 Nov 12.

Authors

Zhifeng Xin¹, Jingjing Liu¹, Xinjian Wang¹, Kejing Shen¹, Zibo Yuan¹, Yifa Chen², Ya-Qian Lan²

Affiliations

¹ Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma'anshan, Anhui 243002, P. R. China.
² Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.

PMID: 34766753
DOI: 10.1021/acsami.1c15187

Abstract

Metal-organic frameworks (MOFs) with plenty of active sites and high porosity have been considered as an excellent platform for the electroreduction of CO₂, yet they are still restricted by the low conductivity or low efficiency. Herein, we insert the electron-conductive polypyrrole (PPy) molecule into the channel of MOFs through the in situ polymerization of pyrrole in the pore of MOF-545-Co to increase the electron-transfer ability of MOF-545-Co and the obtained hybrid materials present excellent electrocatalytic CO₂RR performance. For example, FE_CO of PPy@MOF-545-Co can reach up to 98% at -0.8 V, almost 2 times higher than that of bare MOF-545-Co. The high performance might be attributed to the incorporation of PPy that can serve as electric cables in the channel of MOF to facilitate electron transfer during the CO₂RR process. This attempt might provide new insights to improve the electrocatalytic performance of MOFs for CO₂RR.

Keywords: CO2RR; electrocatalytic performance; electron transfer; metalloporphyrin organic framework; polypyrrole.