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Oxygen reduction on chemically heterogeneous iron-containing nanoporous carbon: the effects of specific surface functionalities
journal contribution
posted on 2016-01-14, 12:29 authored by Mykola Seredych, Mark Biggs, Teresa J. BandoszSynthetic activated carbon containing iron and sulfur heteroatoms, obtained from polystyrene sulfonic acid-based organic salt, and commercial wood-based carbon containing phosphorous were tested as
catalysts for oxygen reduction reactions. The carbons were characterized using adsorption of nitrogen, TA-MS, FTIR, XRD, XPS, potentiometric titration, SEM/EDX, and HR-TEM microscopy. The introduction of
iron to the carbon resulted a marked electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline medium. A current density was higher than that on commonly used platinum modified carbon
and number of electron transfer (~4e-) indicated a high ORR efficiency. This was accompanied by a high tolerance to methanol oxidation and a good long-term stability after 1500 potential cycles. The extensive
surface characterization indicated the fast O2 adsorption and charge transfer was owed to the surface hydrophobicity, small pores and conductivity. The synergistic effect of porosity and specific iron species
containing sulfur lead to high ORR activity and high kinetic current densities.
History
School
- Science
Department
- Chemistry
Published in
Microporous and Mesoporous MaterialsVolume
221Pages
137 - 149Citation
SEREDYCH, M., BIGGS, M.J. and BANDOSZ, T.J., 2016. Oxygen reduction on chemically heterogeneous iron-containing nanoporous carbon: The effects of specific surface functionalities. Microporous and Mesoporous Materials, 221, pp. 137-149.Publisher
© ElsevierVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Acceptance date
2015-09-21Publication date
2015-10-02Copyright date
2016Notes
This paper is in closed access.ISSN
1387-1811Publisher version
Language
- en