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- W2012195168 abstract "Abstract Oxygen electroreduction reaction (ORR) on pristine porous carbide derived carbons (CDCs) and on CDC supports modified with Pt-nanoclusters has been studied in 0.5 M H 2 SO 4 solution using cyclic voltammetry, rotating disk electrode and electrochemical impedance spectroscopy methods. The CDCs were prepared from Mo 2 C (noted as C(Mo 2 C)) at different fixed chlorination temperatures from 600 °C to 1000 °C. The CDCs have tuneable specific surface area, micro- and mesoporosity, good electrical conductivity and corrosion stability at positive electrode potentials. Pt-nanoclusters were deposited onto/into C(Mo 2 C) powders using sodium borohydride reduction method. The X-ray diffraction and high-resolution transmission electron microscopy were applied for the structural and chemical characterization, and the nitrogen sorption method was used for the porosity analysis of the electrode materials studied. The cathodic current densities depend strongly on the synthesis temperature of C(Mo 2 C), indicating that, in addition to the specific surface area and porosity, the crystallinity (density of defects in amorphous areas) has noticeable influence on the ORR rate. Impedance data demonstrated nearly capacitive behaviour in the low AC frequency region, explained by quick cathodic ORR followed by slow adsorption step of the intermediates and reaction products at/inside microporous-mesoporous C(Mo 2 C) and Pt-C(Mo 2 C) electrodes." @default.
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- W2012195168 date "2014-09-01" @default.
- W2012195168 modified "2023-10-01" @default.
- W2012195168 title "Influence of specific surface area and microporosity-mesoporosity of pristine and Pt-nanoclusters modified carbide derived carbon electrodes on the oxygen electroreduction" @default.
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- W2012195168 doi "https://doi.org/10.1016/j.electacta.2014.04.054" @default.
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