Theophylline-regulated pyrolysis synthesis of nitrogen-doped carbon nanotubes with iron-cobalt nanoparticles for greatly boosting oxygen reduction reaction

[Display omitted] At present, construction of economical, efficient and stable electrocatalysts for oxygen reduction reaction (ORR) is critical to alleviate the energy shortage. Theophylline (THP) can be easily extracted from natural plants, whose nitrogen atoms can chelate with metal ions. With ass...

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Published in:Journal of colloid and interface science Vol. 626; pp. 653 - 661
Main Authors: Zhang, Wei, Chen, Yu-Ping, Zhang, Lu, Feng, Jiu-Ju, Li, Xin-Sheng, Wang, Ai-Jun
Format: Journal Article
Language:English
Published: Elsevier Inc 15.11.2022
Subjects:
alloys
carbon
carbon nanotubes
Electrocatalyst
electrochemistry
energy
Iron-cobalt alloyed nanoparticles
nitrogen
Nitrogen-doped carbon nanotubes
Oxygen reduction reaction
Pyrolysis
Theophylline
Pyrolysis
Electrocatalyst
Iron-cobalt alloyed nanoparticles
Nitrogen-doped carbon nanotubes
Oxygen reduction reaction
Theophylline
ISSN:0021-9797, 1095-7103, 1095-7103
Online Access:Get full text
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Summary:[Display omitted] At present, construction of economical, efficient and stable electrocatalysts for oxygen reduction reaction (ORR) is critical to alleviate the energy shortage. Theophylline (THP) can be easily extracted from natural plants, whose nitrogen atoms can chelate with metal ions. With assistance of THP, FeCo alloy was confined in N-doped carbon nanotubes (FeCo/NCNTs-800) by one-step pyrolysis of a mixture of the metal precursors, g-C3N4 and THP. The resulting FeCo/NCNTs-800 showed a better ORR performance (onset potential, Eonset = 1.09 V; half-wave potential, E1/2 = 0.87 V) than commercial Pt/C (50 wt%) in a 0.1 M KOH solution, with a limiting current density as high as –5.54 mA cm−2. This work offers a feasible strategy for developing transitional bimetal-based carbon catalysts in alkaline fuel cells.
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ISSN:0021-9797
1095-7103
1095-7103
DOI:10.1016/j.jcis.2022.06.130