The anodic evolution of sulphur from sodium polysulphide melts—II. Microscopic studies with thin layer cells
✍ Scribed by M.P.J. Brennan
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 678 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0013-4686
No coin nor oath required. For personal study only.
✦ Synopsis
Previous voltaiumetric work[1]
on the anodic evolution of sulphur has been complemented by a microscopic study of the surfaces of working anodes in a thin-layer cell . The observations confirm the earlier conclusions that the anodic process initially involves the oxidation of polysulphide anions to higher polysulphides, and that the formation of sulphur does not commence until the electrode potential reaches the sulphur/sodium polysulphide equilibrium value . Sulphur is evolved as spheroidal globules, which do not appear to wet or passivatc the electrode surface at the current levels employed . It is thought that the globules are liquid, but the possibility that they may be partially gaseous cannot be entirety ruled ouL