Home | My Profile | Contact Us
Research Trends Products  |   order gateway  |   author gateway  |   editor gateway  
Register | Forgot Password

Author Resources
 Author Gateway
 Article submission guidelines

Editor Resources
 Editor/Referee Gateway

 Regional Subscription Agents/Distributors
Current Topics in Electrochemistry   Volumes    Volume 23 
Formation and electrochemical reduction of the ion-pair charge-transfer complex of aurothiosulfate(I) anion and sodium cation
Eduard Stezeryanskii, Anatoliy Omelchuk
Pages: 33 - 43
Number of pages: 11
Current Topics in Electrochemistry
Volume 23 

Copyright © 2021 Research Trends. All rights reserved

The electrochemical reduction of gold(I) thiosulfate complexes was studied by differential UV spectroscopy and voltammetry on gold rotating disk electrode (RDE). In the UV spectrum of solutions, an absorption band with a maximum at 260.7 nm was detected. The presence of this band indicates the formation of the ion-pair charge-transfer complex (IPCT) of aurothiosulfate(I) anion and sodium cation {Na+[Au(S2O3)2]3-}. The results of polarization measurements on a gold RDE showed that electron transfer is preceded by a homogeneous chemical reaction of addition of Na+ cations and the formation of an electrochemical active species, an IPCT complex {Na+[Au(S2O3)2]3-}. The stability constants of the IPCT complex were determined: 45.2 ± 0.6 L mol-1 (from the result of UV spectroscopy) and 41.4 ± 0.8 L mol-1. The heterogeneous electrochemical reaction proceeds by the reductive electrochemical desorption mechanism and is described by a first-order kinetic equation. The rate-determining step of the process is desorption from the active center of the adsorbed species (S2O32- or others).
Buy this Article


Buy this article
Buy this volume
Subscribe to this title
Shopping Cart

Quick Links
Search Products
Browse in Alphabetical Order : Journals
Browse by Subject Classification : Journals

Ordering Information Ordering Information
Downloadable forms Downloadable Forms