Effect of Triton-×-100 on the Rate of Hydrogen Evolution at a Cathode

摘要

The effect of H2 evolution on the mass-transfer coefficient of cathode reduction of potassiumferricyanide at a mercury cathode was studied with the aim of (i) comparing the mass transfer behaviorat a Hg cathode with that at solid electrodes under gas-evolving conditions and (ii) testing the effect ofnon-ionic surface-active agent on the mass transfer behavior of an H2-evolving Hg cathode. It is foundthat the mass transfer coefficient at the Hg cathode was much higher than the value at a solid cathode.The mass transfer coefficient at H2 evolving Hg was found to decrease in the presence of Triton--100 surfactant by an amount ranging from 62 to 82%, depending on the H2 discharge rate and the Triton-- 100 concentrations.