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Oxygen reduction on chemically heterogeneous iron-containing nanoporous carbon: the effects of specific surface functionalities

journal contribution
posted on 14.01.2016 by Mykola Seredych, Mark Biggs, Teresa J. Bandosz
Synthetic 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 Materials

Volume

221

Pages

137 - 149

Citation

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

© Elsevier

Version

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

21/09/2015

Publication date

2015-10-02

Copyright date

2016

Notes

This paper is in closed access.

ISSN

1387-1811

Language

en

Exports