Solar Thermal Decoupled Electrolysis: Long-term Behavior of Electrolytic Cell
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The use of Co(OH)2 to facilitate the electrolytic production of H2 from stirred, highly alkaline, aqueous solutions was studied using voltammetry and bulk electrolysis at a rotating disc electrode (RDE). In agreement with theory, convection produced by the RDE increased the mass transfer to the electrode surface, which, lead to the desired increased current density over quiescent solutions. An extended form of our previously developed model was developed and used to predict the shape of cyclic and linear voltammograms for different conditions and to extract critical information and parameters for understanding the reaction mechanism. Unexpectedly, but beneficially, it was also observed that the electrode area increased during the course of bulk electrolysis as material was deposited on the anode.
Ochsendorf, Marcus A.; Schoer, Jon; Silcox, Rachel; Venstrom, Luke; Nudehi, Shahin; Engerer, Laura; and Palumbo, Robert, "Solar Thermal Decoupled Electrolysis: Long-term Behavior of Electrolytic Cell" (2018). Fall Interdisciplinary Research Symposium. 92.