Publication: Anodic H2O2 Generation in Carbonate-Based Electrolytes—Mechanistic Insight from Scanning Electrochemical Microscopy

For the anodic H2O2 generation, it has been shown that the electrolyte composition can steer the reaction pathway toward increased H2O2 generation. In this publication, Carla Santana Santos and her team in the Schuhmann lab of Ruhr University Bochum determined the changes in the fraction of carbonate species in the vicinity of an anode by performing local pH measurements using a Au nanoelectrode positioned in close proximity to an operating anode by shear-force scanning electrochemical microscopy (SECM). It could be confirmed that the main anionic species at the interface is HCO3−, at potentials where H2O2 is preferentially formed, regardless of the pH value in the bulk.

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Graphical abstract from publication in Angewandte Chemie