Abstract
The electron-transfer reactions from methyl viologen monocation radicals to colloidal platinum hydrosols were studied using the pulse-radiolysis technique. Besides the reduction of water, hydrogenation of methyl viologen on platinum also takes place in these reactions. Evolution of hydrogen is enhanced at higher temperatures (65 °C) and reduction of MV+ is hindered. The reaction shows complex behaviour in the presence of hydrogen because of the formation of reduction products which decrease the catalytic activity of platinum. The reaction rate decreases from 1.3 × 103 s–1 in an argon-saturated solution to 0.6 s–1 in a hydrogen-saturated solution in the presence of 2.5 × 10–5 mol dm–3 Pt hydrosols.
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 callMore From: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Disclaimer: 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.
