Journal
ELECTROCHIMICA ACTA
Volume 108, Issue -, Pages 404-411Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.06.133
Keywords
Sulfur-doped ordered mesoporous carbon; Oxygen reduction reaction; Metal-free electrocatalyst
Categories
Funding
- National Natural Science Foundation of China [21075014]
- Fundamental Research Funds for the Central Universities [11SSXT144]
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Sulfur-doped ordered mesoporous carbons (OMC-S-X) (X=1, 2 and 3) with different sulfur contents were synthesized as metal-free electrocatalyst for oxygen reduction reaction (ORR). Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectra (EDX), nitrogen adsorption-desorption, X-ray diffraction (XRD) and X-ray photoelectron spectra (XPS) were employed to confirm the characterizations of OMC and OMC-S. The prepared OMC-S-3 exhibits high electrocatalytic activity, good stability and excellent tolerance to crossover effect for ORR. The high electrocatalytic activity of OMC-S-3 for ORR can be mainly ascribed to the doping of sulfur especially the existence of sulfide groups (-C-S-C-) which play an important role in promoting the ORE. (C) 2013 Elsevier Ltd. All rights reserved.
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