Evidence for Site‐Specific Interaction of Redox Species at the FeS2 / Electrolyte Interface

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Abstract
Adsorption of organic ligands [e.g., (1H‐benzotriazol‐1‐yl)‐methylisocyanide; btic, Fig. 1] and deposition of platinum on pyrite surfaces leads to the selective blocking of specific surface sites for electron transfer. In electrochemical experiments a drastic decrease of currents was observed with an Fe2+/3+ electrolyte, but only slightly diminished currents for an I− electrolyte. From this it is inferred that the two different redox species interact with chemically different sites on the surface of pyrite.

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