It has been shown that the chemical nature of electrodeposited rhenium species depends on the H2SO4 concentration in the supporting electrolyte from which the deposition takes place. In dilute H 2SO4, mostly ReO2 and ReO3 and traces of Re2O5 are deposited. With the increase of H 2SO4 concentration, Re2O5 becomes the principal deposit; in H2SO4 solution in higher concentration than 10 M, solely Re2O5 is deposited. From highly dilute H2SO4 solutions (pH ≈ 0.9), Re 0 is deposited, which oxidizes at 0.7 V. If the current density of deposition is higher than 80 mA/cm2, thermodynamically two types of Re0 are deposited and oxidized at 0.7 V and 0.95 V.
- Sulfuric acid
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering