The Oxygen Reduction Reaction in Ca²⁺ -Containing DMSO: Reaction Mechanism, Electrode Surface Characterization, and Redox Mediation*.

ABSTRACT: In this study the fundamental understanding of the underlying reactions of a possible Ca-O₂ battery using a DMSO-based electrolyte was strengthened. Employing the rotating ring disc electrode, a transition from a mixed process of O₂ ^- and O₂ ^2- formation to an exclusive O₂ ^- formation at gold electrodes is observed. It is shown that in this system Ca-superoxide and Ca-peroxide are formed as soluble species. However, there is a strongly adsorbed layer of products of the oxygen reduction reaction (ORR) s on the electrode surface, which is blocking the electrode. Surprisingly the blockade is only a partial blockade for the formation of peroxide while the formation of superoxide is maintained. During an anodic sweep,

SUBMITTER: Bawol PP 

PROVIDER: S-EPMC7821240 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature