A Transformation of Intermediates of Sulfide Reduction of Gold(III) on the Pyrolytic Graphite

Abstract

Solid products immobilized from colloids containing intermediates of the reduction oftetrachloroaurate-ions by sodium sulfide on the surface of highly oriented pyrolytic graphite were studied using scanning probe microscopy, cyclic voltammetry and X-ray photoelectron spectroscopy. An evaluation of surface topography and chemical state of both gold and sulfur taking place duringcolloid's pre-aging and under electrochemical oxidation in 0.001 M HCl solution were shown.