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Metal-free nitrogen-doped carbon foam electrocatalysts for the oxygen reduction reaction in acid solution

Liu, J.; Yu, S.; Daio, T.; Ismail, M. S.; Sasaki, K.; Lyth, S. M.

Authors

J. Liu

S. Yu

T. Daio

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Dr Mohammed Ismail m.s.ismail@hull.ac.uk
Lecturer in Chemical Engineering - Hydrogen and Fuel Cell Technologies

K. Sasaki

S. M. Lyth



Abstract

Metal-free, nitrogen-doped carbon foam is utilized as a model non-precious electrocatalyst system to investigate the role of nitrogen in the oxygen reduction reaction (ORR) in the absence of iron contamination. This graphene-like foam displays relatively high activity for the ORR in acid, despite being proven free from transition-metal impurities. The onset potential is 0.85 VRHE, the mass activity is 2.8 A/g at 0.6 VRHE, and the current density is -4.0 mA/cm2. The maximum electron transfer number is calculated to be 3.6, revealing that a 4-electron pathway is possible in nitrogen-doped carbon, even in the absence of transition-metal coordination sites. The excellent electrochemical activity is attributed to the large surface area (700 m2/g), improved conductivity after graphitization, and the relatively high proportion of tertiary (graphite-like) nitrogen.

Citation

Liu, J., Yu, S., Daio, T., Ismail, M. S., Sasaki, K., & Lyth, S. M. (2016). Metal-free nitrogen-doped carbon foam electrocatalysts for the oxygen reduction reaction in acid solution. Journal of the Electrochemical Society, 163(9), F1049-F1054. https://doi.org/10.1149/2.0631609jes

Journal Article Type Article
Publication Date Jan 1, 2016
Deposit Date Jan 21, 2023
Publicly Available Date Feb 3, 2023
Journal Journal of the Electrochemical Society
Print ISSN 0013-4651
Electronic ISSN 1945-7111
Publisher Electrochemical Society
Peer Reviewed Peer Reviewed
Volume 163
Issue 9
Pages F1049-F1054
DOI https://doi.org/10.1149/2.0631609jes
Public URL https://hull-repository.worktribe.com/output/4186259

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