Articulo
Hydrogen evolution on platinum electrodes during the electrolysis of molten potassium bisulphate
Registro en:
issn:0013-4686
Autor
Arvia, Alejandro Jorge
Videla, Héctor A.
Institución
Resumen
Hydrogen is practically the only product formed on a platinum cathode when molten potassium bisulphate is electrolysed at low voltages. It seemed worthwhile to attempt the study of the kinetics of the electrochemical reaction on platinum cathodes at temperatures ranging from 250 to 440°C. We have measured voltage/current curves and the potential decay after the interruption of electrolysis. The electrode potential was measured against a silver/silver-ion reference electrode placed in a container ending in a capillary tip. The ohmic or pseudo-ohmic overpotential was obtained directly by photographing the instantaneous drop of potential at a set current density on the oscilloscope screen. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas