Interfacial Electrochemical Behavior of RuS 2  Single Crystal Electrodes in Sulfuric Acid Medium | Zendy

Sheu JiangShing | Zendy; Shih YenShiang | Zendy; Huang YingSheng | Zendy

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Interfacial Electrochemical Behavior of RuS 2 Single Crystal Electrodes in Sulfuric Acid Medium

Author(s) -

Sheu JiangShing,

Shih YenShiang,

Huang YingSheng

Publication year - 1991

Publication title -

journal of the chinese chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.329

H-Index - 45

eISSN - 2192-6549

pISSN - 0009-4536

DOI - 10.1002/jccs.199100072

Subject(s) - chemistry , electrochemistry , cyclic voltammetry , sulfuric acid , electrode , thiosulfate , valence (chemistry) , desorption , single crystal , dissolution , inorganic chemistry , pyrite , analytical chemistry (journal) , sulfur , crystallography , adsorption , mineralogy , organic chemistry , chromatography

The electrochemical behavior of RuS 2 has been studied using cyclic voltammetry and Energy Dispersive X‐ray Spectroscopy (EDX) techniques. Cyclic voltammograms reveal one major anodic peak and two major cathodic peaks on the reverse sweep; these peaks are attributed to the electroadsorption/desorption of OH − groups on the electrode surface. It is proposed that the electroadsorption of the OH − group on RuS 2 is due to the presence of Ru 4d electrons in the uppermost part of the valence band. Thus, OH − is oxidized by holes on Ru 4d states in the first step. These groups are transferred to S 2 2− sites in the second step. EDX surface analysis reveals preferential release of S 2 2− from the pyrite lattice. A mechanism for the anodic dissolution of RuS 2 is proposed, according to which elemental sulfur is not a direct product, but rather the end product which forms from thiosulfate.

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