Non-precious Fe/N/C catalysts have attracted increased attention due to their activity in oxygen reduction reaction (ORR). To promote the activity of this type of catalysts, we applied the electrochemical treatment of the Fe/N/C sample synthesized by using the known technique. We demonstrated that two-stage anodic-cathodic treatment of the Fe/N/C sample under the certain condition leads to increase the electrocatalytic activity toward the ORR of the starting catalyst. The results may open the opportunities in finding new ways of increasing the activity of Fe/N/C catalysts by using the electrochemical treatment.
Fe/N/C catalyst, synthesis, oxygen reduction reaction, electrochemical treatment
This research was supported by the grant of the Ministry of education and science of the Republic of Kazakhstan 5715/GF 4.
 Peighambardoust S. J., Rowshanzamir S., Amjadi M., International Journal of Hydrogen Energy, 35, 9349 (2010).
 Miller M., Bazylak A., Journal of Power Sources, 196, 601 (2011).
 Yuan, X. Z., Li, H., Zhang, S., Martin, J., Wang, H., Journal of Power Sources, 196, 9107 (2011).
 Chen, Z., Higgins, D., Yu, A., Zhang, L., & Zhang, J., Energy & Environmental Science, 4, 3167 (2011).
 Othman R., Dicks A. L., Zhu Z., International journal of hydrogen energy, 37, 357 (2012).
 Kramm U. I., Bogdanoff P., Fiechter S., Polymer Electrolyte Membrane Fuel Cells (PEM-FC) and Non-noble Metal Catalysts for Oxygen Reduction, Fuel Cells, Springer, New York, P519-575, 2013.
 Kim, J. R., Kim, J. Y., Han, S. B., Park, K. W., Saratale, G. D., Oh, S. E., Bioresource technology, 102, 342 (2011).
 Dombrovskis, J. K., Jeong, H. Y., Fossum, K., Terasaki, O., & Palmqvist, A. E., Chemistry of Materials, 25, 856 (2013).
 Wu G., Zelenay P., Accounts of chemical research, 46, 1878 (2013).
 Shin, D., Jeong, B., Mun, B. S., Jeon, H., Shin, H. J., Baik, J., & Lee, J., The Journal of Physical Chemistry C., 117, 11619 (2013).
 Jaouen, F., Proietti, E., Lefèvre, M., Chenitz, R., Dodelet, J. P., Wu, G., Zelenay, P., Energy & Environmental Science, 4, 114 (2011).
 Papaderakis, A., Mintsouli, I., Georgieva, J., & Sotiropoulos, S., Catalysts, 7, C80 (2017).
 Melendres C. A. Mössbauer, The Journal of Physical Chemistry, 84, 1936 (1980).