Electrolysis of Sodium Chloride Solution with Pt-Plated Titanium Anode

摘要

Titanium plates were electroplated with platinum, and sodium chloride solution was electrolyzed using these plates as anodes. Four kinds of plating baths were tried, and good results were obtained with bath containing 4g of H_2PtCl_6・6H_20, 20g of (NH_4)_2HPO_4 and 100g of Na_2H_2O per litre. Using the best anode obtained, sodium chloride solution was electrolyzed without diaphragm at room temperature for about 13 months, the solution being renewed at intervals of 7 or 8 days. Current was about 1 A and the volume of the solution was about 250ml. The surface of the anode looked unchanged after 13 months.