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

Pei-Pei He, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Jin-Hua Shi, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Xiao-Yu Li, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Ming-Jie Liu, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Zhou Fang, b School of materials science and engineering, Zhejiang University, Hangzhou 310058, P.R. China
Jing He, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Zhong-Jian Li, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. China
Xin-Sheng Peng, b School of materials science and engineering, Zhejiang University, Hangzhou 310058, P.R. China
Qing-Gang He, a College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P.R. ChinaFollow

Corresponding Author

Qing-Gang 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 generated adequate mesopores and created a hierarchical porous structure that enhances mass transfer efficiency. X-ray photoelectron spectroscopic analysis 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 reached 0.77 V (vs. RHE), outperforming the catalyst without CNTs. When the TCPPCo-MOF-CNT was employed as the cathode catalyst in assembling microbial fuel cells (MFCs) with Nafion-117 as the proton exchange membrane, the maximum power density of MFCs reached approximately 500 mW·m^–2.

Graphical Abstract

Keywords

Metal organic framework, CNT intercalated, Electrocatalysis, Oxygen reduction reaction, Microbial fuel cell

DOI Link

https://doi.org/10.61558/2993-074X.3502

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2025-01-28

Online Available Date

2024-10-16

Revised Date

2024-09-06

Received Date

2024-05-24

Recommended Citation

Pei-Pei He, Jin-Hua Shi, Xiao-Yu Li, Ming-Jie Liu, Zhou Fang, Jing He, Zhong-Jian Li, Xin-Sheng Peng, Qing-Gang He. A CNT Intercalated Co Porphyrin-based Metal Organic Framework Catalyst for Oxygen Reduction Reaction[J]. Journal of Electrochemistry, 2025 , 31(1): 2405241.
DOI: 10.61558/2993-074X.3502
Available at: https://jelectrochem.xmu.edu.cn/journal/vol31/iss1/1

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