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The electrocatalytic influence of Pb and Tl adsorbates on the reduction of nitrobenzene and m-dinitrobenzene on platinum

✍ Scribed by G. Kokkinidis; P.D. Jannakoudakis

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
614 KB
Volume
29
Category
Article
ISSN
0013-4686

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✦ Synopsis

The reduction of nitrobenzeneand m-dinitrobenzene on platinum surfaces modified by Pband TI monolayers deposited at underpotentials was studied in aqueous acid solutions. It was found that Pb and Tl adsorbates markedly catalyze the reduction of the above substances. The enhancement of the overall reduction processes has been interpreted in terms of the change of the nitrogroup reduction mechanism from chemical mechanism on bare platinum to electron mechanism on Pt surfaces covered by Pb and Tl monolayers. The reaction paths of the reduction of nitrocompounds both on bare platinum end Pt surfaces modified by Pb and TI adsorbates have been discussed on the basis OF the diagnostic plots, which are known from the theory of the rotating disc-ring electrode.

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