Estimation of the composition of electrolytically prepared intermetallic bismuth–platinum deposits

Abstract

The method of partial anodic peak resolution is applied to complex voltammograms. The estimation of the composition of the intermetallic Bi-Pt compounds electrolytically deposited is carried out by a resolution of the components of the voltammograms. It is shown that nonequilibrium conditions take place in electrolytic Bi-Pt deposit when three intermetallic compounds such as: Pt 2 Bi 3 , PtBi 2 , PtBi, and phase of pure Bi exist simultaneously on the electrode.

Targeted recovery of metals from thermoelectric generators (TEGs) using chloride brines and ultrasound

“…The CVs of Bi chloride in the various brines show two redox events, the rst being related to the Bi 3+/0 couple (at around −0.6 V vs. [Fe(CN) 6 ] 3−/4− in CaCl 2 $6H 2 O brines and around −0.4 V vs. [Fe(CN) 6 ] 3−/4− in ChCl brines) while the other is related to the formation of platinum-bismuth alloys, 41 and the subsequent oxidation of Bi from the alloy at more anodic potentials. 42 With increasing chloride concentration, the Bi 3+/0 redox couple becomes more cathodic, i.e.…”

Determination of platinum in mineral raw materials by switching chronoamperometry

“…Several ways of platinum determination have been suggested by means of using a highly sensitive method of stripping voltammetry [2,3,4]. However, this method is complex and multistage, because the determination of platinum (II or IV) in solutions with anodic stripping voltammetry is feasible only after the platinum electrodeposition in an alloy with a metal-activator on the surface of the graphite electrode with the following selective electrooxidation from the electronegative component alloy.…”