A CNT Intercalated Co Porphyrin-based Metal Organic Framework Catalyst for Oxygen Reduction Reaction

Authors

Peipei He, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Jinhua Shi, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Xiaoyu Li, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Mingjie Liu, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Zhou Fang, School of materials science and engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Jing He, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Zhongjian Li, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Xinsheng Peng, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China
Qinggang He, College of Chemical and Biological Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China

Document Type

Article

Corresponding Author(s)

Qinggang He(qghe@zju.edu.cn)

Abstract

The poor electronic conductivity of metal−organic framework (MOF) materials hinders their direct application in the field of electrocatalysis in fuel cells. Herein, we proposed a strategy of embedding carbon nanotubes (CNTs) during the growth process of MOF crystals, synthesizing a metalloporphyrin-based MOF catalyst TCPPCo-MOF-CNT with a unique CNT-intercalated MOF structure. Physical characterization revealed that the CNTs enhance the overall conductivity while retaining the original characteristics of the MOF and metalloporphyrin. Simultaneously, the insertion of CNTs, generating adequate mesopores and creating a hierarchical porous structure that enhances mass transfer efficiency. XPS confirmed that the C atom in CNT changed the electron cloud density on the catalytic active center Co, optimizing the electronic structure. Consequently, the E_1/2 of the TCPPCo-MOF-CNT catalyst under neutral conditions reaches 0.77 V (vs. RHE), outperforming the catalyst without CNTs. When TCPPCo-MOF-CNT was employed as the cathode catalyst in assembling Microbial Fuel Cells (MFCs) with Nafion-117 as the PEM, the maximum power density of MFCs reached approximately 500 mW m^-2.

Graphical Abstract

Keywords

Metal organic framework, CNT intercalated, electrocatalysis, ORR, Microbial Fuel Cells

DOI

10.61558/2993-074X.3502

Online Date

10-16-2024

Recommended Citation

Peipei He, Jinhua Shi, Xiaoyu Li , Mingjie Liu , Zhou Fang , Jing He , Zhongjian Li , Xinsheng Peng , Qinggang He . A CNT Intercalated Co Porphyrin-based Metal Organic Framework Catalyst for Oxygen Reduction Reaction[J]. Journal of Electrochemistry, doi: 10.61558/2993-074X.3502.