Imperial College London
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ProfessorMagdaTitirici

Faculty of Engineering, Department of Chemical Engineering

Chair in Sustainable Energy Materials
 
 
 
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Contact

 

+44 (0)20 7594 5601m.titirici

 
 
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Location

 

ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Xu:2023:10.1002/smll.202302795,
author = {Xu, Y and Xie, R and Li, Q and Feng, J and Luo, H and Ye, Q and Guo, Z and Cao, Y and Palma, M and Chai, G and Titirici, M-M and Jones, CR},
doi = {10.1002/smll.202302795},
journal = {Small},
pages = {1--14},
title = {Pyridine functionalized carbon nanotubes: unveiling the role of external pyridinic nitrogen sites for oxygen reduction reaction},
url = {http://dx.doi.org/10.1002/smll.202302795},
volume = {19},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Pyridinic nitrogen has been recognized as the primary active site in nitrogen-doped carbon electrocatalysts for the oxygen reduction reaction (ORR), which is a critical process in many renewable energy devices. However, the preparation of nitrogen-doped carbon catalysts comprised of exclusively pyridinic nitrogen remains challenging, as well as understanding the precise ORR mechanisms on the catalyst. Herein, a novel process is developed using pyridyne reactive intermediates to functionalize carbon nanotubes (CNTs) exclusively with pyridine rings for ORR electrocatalysis. The relationship between the structure and ORR performance of the prepared materials is studied in combination with density functional theory calculations to probe the ORR mechanism on the catalyst. Pyridinic nitrogen can contribute to a more efficient 4-electron reaction pathway, while high level of pyridyne functionalization result in negative structural effects, such as poor electrical conductivity, reduced surface area, and small pore diameters, that suppressed the ORR performance. This study provides insights into pyridine-doped CNTs-functionalized for the first time via pyridyne intermediates-as applied in the ORR and is expected to serve as valuable inspiration in designing high-performance electrocatalysts for energy applications.
AU  - Xu,Y
AU  - Xie,R
AU  - Li,Q
AU  - Feng,J
AU  - Luo,H
AU  - Ye,Q
AU  - Guo,Z
AU  - Cao,Y
AU  - Palma,M
AU  - Chai,G
AU  - Titirici,M-M
AU  - Jones,CR
DO  - 10.1002/smll.202302795
EP  - 14
PY  - 2023///
SN  - 1613-6810
SP  - 1
TI  - Pyridine functionalized carbon nanotubes: unveiling the role of external pyridinic nitrogen sites for oxygen reduction reaction
T2  - Small
UR  - http://dx.doi.org/10.1002/smll.202302795
UR  - https://www.ncbi.nlm.nih.gov/pubmed/37415517
UR  - https://onlinelibrary.wiley.com/doi/full/10.1002/smll.202302795
UR  - http://hdl.handle.net/10044/1/105747
VL  - 19
ER  -
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