The electrochemical surface reactivity of iron sulfide, FeS2

Rotating Ring (Pt)–Disc (FeS2) Electrode Behavior in Hydrochloric Solutions

“…Ahlberg and Broo (16) found a metal-deficient sulfide and hydrogen peroxide involved in the redox process. Using cyclic voltammetry, Conway et al (17) observed two almost reversible monolayer surface processes occurring on the pyrite surface in the potential range Ϫ0.2 to ϩ0.45 V vs SHE at pH 1.…”

Oxygen Reduction on Silver in 6.5M Caustic Soda Solution

“…The applied potential is defined as Eappl = (I)met -(~re and therefore [29] = E.~-(,:I,o -':I'ro) -Uj,~f [30] where the potential difference q5o -O~e accounts for the ohmic potential drop between the reference electrode and the working electrode. The common practice in the literature is to report the overall exchange current density instead of the partial exchange current densities.…”

Semiconductor electrochemistry of coal pyrite. Final technical report, September 1990--September 1995

“…That is, the sulfur produced during the anodic dissolution of pyrite is a stable end product, but not an intermediate species in the sulfate reaction pathway (Biegler and Swift, 1979). Other investigators have suggested that the end products of elemental sulfur and sulfate may be produced via intermediate sulfoxy anions, such as sulfite, SO32-, thiosulfate, S 2 0 3 2 -, and polythionates, Sn062-(n = 4, 5, and 6) (Conway et al, 1980;Goldhaber, 1983;Morse et al, 1987). Buckley and Woods (1984) and Buckley et aL(1988) postulated that instead of elemental sulfur, an iron deficient pyrite (Fel,&) was produced as a metastable product.…”