Anode for electrolytic hydrogen prodn. cell - is made of a ternary mixt. of nickel, cobalt, and sulphur

摘要

Electrolytic cell has an anode and a cathode immersed in an alkaline electrolyte, the anode being made of a ternary mixt. of 0-90% Ni, 0-90% Co and 5-45%S. The cathode is pref. made of a binary mixt. of 60-95% Ni and 5-40% S. The process gives good activation of the electrodes and reduces the overvoltage, esp. of the anode, thus giving reduced energy consumption of the cell. Pref. the anodes are made by forming an aq. soln. of CoCl2, NiCl2 NH4Cl, Na2SO3 and Sa2S2O3 and using this as electrolyte for deposition of the ternary Ni/Co/S mixt. of a (pref. Ni) grid, after which the anode is heated in air at 100-300 degrees C for 1 hour.