Abstract
The current due to the H2O2 reduction at Pt electrodes in H2SO4 solutions shows a period-1 oscillation, named oscillation A. This work reports that the oscillation changes into complex oscillations such as a mixed-mode, chaotic, and period-n oscillations when Na2SO4 or K2SO4 is added to the solutions. The alkali metal ions originated from the salts, namely, Na+ and K+ ions, increase the local pH at the electrode surface during the H2O2 reduction, as has been reported before (ECS Transactions 64 (2015) 49). However, the complex oscillations are found not to be caused by the increase in the local pH. It is possibly that a non-covalent interaction between adsorbed OH, that is the reaction intermediate of the H2O2 reduction, and the alkali metal ions plays a crucial role for the appearance of the complex oscillations. The clarification of the origin of the complex oscillations needs further study.
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.
