ORALS
SESSION: ElectrochemistryWedPM1-R2
| Amatore International Symposium on Electrochemistry for Sustainable Development |
| Wed Nov, 7 2018 / Room: Copacabana B (150/1st) | |
| Session Chairs: Dongping Zhan; Session Monitor: TBA |
14:50: [ElectrochemistryWedPM107]
Influence of the Cobalt and Iron Doping on the Platinum-free Carbon-based Electrocatalysts for Oxygen Reduction Reaction Properties Tatiana
Lastovina1 ; Yulia
Pimonova
1 ; Andriy
Budnyk
1 ;
1Southern Federal University, Rostov-on-Don, Russian Federation;
Paper Id: 265
[Abstract] Air-hydrogen low temperature fuel cells are promising devices for a sustainable energy supply. Carbon-supported platinum-based nanoparticles are the most active and stable cathodic electrocatalysts [1]. Nowadays, attention has been moving towards Pt-free catalysts like metal oxides, carbides/nitrides, and metals-free or metals-doped carbons.
In this study, we investigated the influence of the cobalt and iron concentration in carbons on their catalytic activity and stability in the oxygen reduction reaction. Catalytically active carbons were prepared from a bimetallic zeolitic imidazolate framework (ZIF) [2]. The synthetic procedure included three steps: i) preparation of a hybrid Co/Zn-ZIF; ii) impregnation with iron acetate (II) and 1,10-phenanthroline; iii) calcination at 700 °C for 3 h under argon flow [3].
The properties of prepared materials were assessed with the set of techniques, including HR-TEM and SEM, TGA, XRD. High energy resolution fluorescence detection XANES spectra were measured at the ESRF. The electrochemical properties of the prepared electrocatalysts were investigated by cyclic voltammetry and linear sweep voltammetry.
The metal content was found influencing both morphology and catalytic activity of the prepared carbons. Increase in relative quantity of cobalt and in the final material stimulated formation of bamboo-like carbon nanotubes.
References:
[1] V.E. Guterman, T.A. Lastovina, S.V. Belenov, N.Y. Tabachkova, V.G. Vlasenko, I.I. Khodos, E.N. Balakshina, J. Solid State Electrochem. 18 (2014) 1307-1317.
[2] T. A. Lastovina, J. A. Pimonova, A. P. Budnyk, J. Phys. Conf. Ser. 829 (2017) 012007.
[3] T. A. Lastovina, A. P. Budnyk, Y. A. Pimonova, A. L. Bugaev, A. G. Fedorenko, V. P. Dmitriev, Electrochem. Commun. 88 (2018) 83-87.
