Electrochemical activity of the electrodes with electrocatalytic coatings

Electrochemical activity of electrodes for electrolysis of water is investigated. As catalysts coating Ni-S-Co, suspension LaNi_2.5Co_2.4Al_0.1 or their combinations were applied. As electrolyte at test of electrodes 30% KOH or NaOH is used. Current density varied in a range from 10 to 600 мА/cm² at temperature 20-80°C. When the temperature increases from 20 to 80°C the current density on cathodes with composite LaNi2.5Co2.4Alo.i/Ni-S-Co catalyst increases 4 times at constant potential E = –1.10 V (rel. Hg/HgO). When the current density of more than 100 mA/cm² cathodes with all catalysts offered by us in this work have lower value of potential than the similar cathodes described in the scientific literature. In contrast to the cathodes, catalyst LaNi_2.5Co_2.4Al_0.1/Ni–S–Co does not render influence on electrochemical activity of the anode.

Authors:

Kryukov Yu. I., Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071

Lukovtsev Vyacheslav Pavlovich, Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071, el-02@inail.ru

Petrenko Elena Mikhailovna, Institute of Physical Chemistry and Electrochemistry of A. N. Frumkina of RAS, 31, Leninsky Ave, Moscow, 119071, el-02@mail.ru

Key words:

электрохимическая активность, плотность тока, потенциал, электролиз воды, катализатор

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Journal issue:

2011. Т. 11, № 4,

Heading:

Fuel cells

DOI:

https://doi.org/10.18500/1608-4039-2011-11-4-184-186

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