The boosting of electrocatalytic CO2-to-CO transformation by using the carbon nanotubes-supported PCN-222(Fe) nanoparticles composite

Molecular complexes with active metal centers exhibit high activity and selectivity for electrochemical CO 2 reduction reaction (CO 2 RR), which represents a promising method for transforming greenhouse gas into valuable chemicals and feedstock. Using metal–organic frameworks (MOFs) to load the acti...

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Bibliographic Details
Published in:Journal of materials science 2022, Vol.57 (1), p.526-537
Main Authors: Xu, Lin-Wei, Qian, She-Liang, Dong, Bao-Xia, Feng, Li-Gang, Li, Zong-Wei
Format: Article
Language:English
Subjects:
Carbon
Carbon dioxide
Carbon nanotubes
Catalysts
Characterization and Evaluation of Materials
Chemical reduction
Chemistry and Materials Science
Classical Mechanics
Coordination compounds
Crystallography and Scattering Methods
Efficiency
Electronic materials
Energy Materials
Greenhouse gases
Hydrogen evolution reactions
Iron
Materials Science
Metal-organic frameworks
Nanoparticles
Polymer Sciences
Porphyrins
Selectivity
Solid Mechanics
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Summary:Molecular complexes with active metal centers exhibit high activity and selectivity for electrochemical CO 2 reduction reaction (CO 2 RR), which represents a promising method for transforming greenhouse gas into valuable chemicals and feedstock. Using metal–organic frameworks (MOFs) to load the active molecular complexes then employing the combination with the carbonic conducting material may exhibit a beneficial effect for CO 2 RR. Herein, we obtained a composite catalyst named PCN-222(Fe)/CNTs, which was in situ synthesized through the solvothermal method that loads iron porphyrin-centered PCN-222(Fe) molecules onto CNTs. The catalyst PCN-222(Fe)/CNTs exhibits excellent electrocatalytic performance for CO 2 RR with a FE CO of 95.5% (m(Fe-TCPP):m(CNTs) = 1:30, written as PCN-222(Fe)/CNTs-30) and an overpotential ( η ) of 494 mV. In addition, the turnover frequency (TOF) is high as 448.76 h −1 (3.011 site −1  s −1 ) and the hydrogen evolution reaction (HER) is indistinctive. After long-term electrocatalysis of 10 h at −0.6 V vs. RHE, PCN-222(Fe)/CNTs-30 remained its high catalytic performance with average FE CO  = 90%. This work provides a solid foundation for further research in the high-efficiency transformation of CO 2 to CO. Graphical abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06592-9