✦ LIBER ✦

The cathodic polarization of iron in acidic acetonitrile-water solutions

✍ Scribed by Elisabet Ahlberg; Mick Friel

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 711 KB
Volume: 34
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(89)87109-9

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✦ Synopsis

In the presence as well as in the absence ofacetonitrile the hydrogen evolution reaction was found to follow a Volmer-Heyrovsky mechanism with a minor contribution from the Tafel reaction in parallel. Contribution from surface diffusion between equally spaced step lines were found in both cases. The inhibition of the hydrogen evolution reaction in the presence of acetonitrile can be explained by adsorption of acetonitrile on active sites on the surface. Stronger adsorption of acetonitrile took place if the electrode was polarized anodically prior to the cathodic scan. A reduction, corresponding to the adsorbed acetonitrile can be found, which agrees with results obtained on platinum.

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