Cd|KOH|NiOOH

Zn|NH4CI|MnO2

Li|LiClO4|MnO2

Pb|H2SO4|PbO2

H2|KOH|O2

Electrochemical activity of the cathodes with chemical coatings Ni-S-Fe

The electrochemical activity of nickel mesh cathodes activated by electrocatalysts of chemically deposited coatings Ni-S-Fe is investigated. The maximum reduction of overvoltage at current density 6 kA/m2 and temperature 70°C is 0.34 V. Comparison of the electrochemical activity of such cathodes with similar cathodes described in the scientific literature revealed that at the same temperature and same overvoltage the current density is twice higher than for the known electrodes. It is shown that with increasing temperature from 20 to 90°C overvoltage at the current density 4kA/m2 reduced by 110mV. Testing of the electrodes with electrocatalysts Ni-S-Fe in the laboratory electrolyser for 850 hours of continuous operation at current density 12kA/m2 indicate the stability of their electrochemical activity.

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