Cobalt and molybdenum activated electrodes in foam based alkaline electrolysis cells at 150–250 °C and 40 bar
By Allebrod, Frank; Chatzichristodoulou, Christodoulos & Mogensen, Mogens B.
Published in Journal of Power Sources
2014
Abstract
A new type of alkaline electrolysis cells with nickel foam based gas diffusion electrodes and KOH (aq) immobilized in mesoporous SrTiO3 has been developed and tested at temperatures of 150 °C, 200 °C and 250 °C at a pressure of 40Â bar. Two cells have been characterized during the 270Â h long test, using impedance spectroscopy, cyclic voltammetry and chronoamperometry at an applied cell voltage of 1.5Â V, 1.625Â V and 1.75Â V. The performance of the electrolysis cells was improved by the addition of cobalt oxide and molybdenum oxide as nano sized electro-catalysts. At 250 °C current densities of 1.1Â AÂ cm-2 and 2.3Â AÂ cm-2 were obtained at cell voltages of 1.5Â V and 1.75Â V, respectively.