The oscillatory electro-oxidation of 2-propanol on platinum: the effect of temperature and of the addition of methanol

08 June 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


The oscillatory electro-oxidation of 2-propanol on platinum and on platinum-based catalysts have attracted growing attention in recent years due to its importance to the interconversion between chemical and electrical energies. This reaction might proceed with a very high selectivity to acetone, nearly without formation of carbon dioxide, and the reversibility of the 2-propanol/acetone pair is very appropriate for hydrogen transfer. An important aspect of this system is the ubiquitous emergence of potential oscillations under current control, and it has been pointed as problem to be avoided and a primary cause of limitation to the use of 2-propanol in practical devices. Herein we present an experimental study of the electrochemical instabilities in the electro-oxidation of 2-propanol on platinum. The system was studied using polycrystalline platinum, in acidic media and at different temperatures. Besides the extensive characterization of the potential oscillations, we have also discussed possible venues of engineer the dynamics to benefit from the potential oscillations. In this sense, we have also characterized the instabilities in the system containing a mixture of 2-propanol and methanol. The efficiency of a hypothetical fuel cell operated under different conditions is also presented.



Supplementary materials

Suporting Information
Supporting information files with additional experimental data


Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.