The electrochemical formation and electron spectroscopic characterization of the platinum sulfide electrode

The anodic voltammetry of acetonitrile solutions containing hydrogen sulfide shows that modification of the platinum electrode surface occurs at potentials sufficiently anodic to oxidize hydrogen sulfide (≥1.25 V vs. SCE). The cathodic voltammetry of these electrodes which have been subjected to anodic polarization shows the reductive discharge of the modified surface at -0.70 V vs. SCE. Comparison of the electron energy (e.s.c.a.) spectra of the modified surface with those of various authentic samples indicates that the anodic modification of the surface is the oxidative formation of PtS.