✦ LIBER ✦

Electrocatalysis of the charge-transfer process for the Sb(III)/Sb(V) couple at a platinum electrode in concentrated HCl

✍ Scribed by L.R. Taylor; B.A. Parkinson; D.C. Johnson

Publisher: Elsevier Science
Year: 1975
Tongue: English
Weight: 533 KB
Volume: 20
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(75)85064-x

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✦ Synopsis

Electrocatalysis of the electrochemical oxidation and reduction of Sb(V) and Sb(III) by adsorbed I-and Iz at a rotating Pt disc electrode was investigated in 12M HCL. The heterogeneous rate constant in the absence of adsorbed halogen was increased by 200x for a maximum surface coverage by halogen. This large rate increase cannot be predicted on the basis of an electrostatic argument and a mechanism based on electron-transfer bridging is proposed.