Abstract
Hydrogen peroxide is recognized as one of the most probable intermediate species during oxygen reduction reaction (ORR) on various metals. In this work, H2O2 reduction and oxidation on Pt(111) have been studied in a non‐adsorbing electrolyte by cyclic voltammetry and online electrochemical mass spectrometry. H2O2 is oxidized and reduced into two different, but interrelated electron transfer processes. As the potential increases, the reduction of H2O2 switches rapidly to its oxidation at ~E>0.9V. The whole process exhibits a marked hysteresis in the mixed charge transfer–diffusion controlled potential region, together with current overshoots at E>0.85V and E<0.27V in quiescent solutions. At high potentials, Pt(111) oxides and O2 evolution explain the current–potential characteristics, while at low potentials, hydrogen adsorption is at the origin of the current response.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
