The Electrode Kinetics of the Chromous-Chromic Couple

A Bismuth‐Based Electrocatalyst for the Chromous‐Chromic Couple in Acid Electrolytes

“…1). This wide peak separation indicates that the redox kinetics are rather irreversible, a phenomenon that has also been observed in this and other laboratories on hanging Hg (5)(6)(7)(8)(9)(10)(11) and thin film Hg/Ni (16) electrodes in similar electrolytes. The irreversible character of this reaction has been attributed to the high inner sphere free energy of reorganization involved in the electron transfer process (19).…”

“…A Cr(III)/Cr(II)//Fe(II)/ Fe(III) aqueous ceil using an acid chloride electrolyte has been developed by NASA-Lewis Research Center and shown to exhibit promising characteristics for energy storage applications (2,3). (5)(6)(7)(8)(9)(10)(11)]. (5)(6)(7)(8)(9)(10)(11)].…”

“…From a fundamental viewpoint, the electrochemical behavior of the Cr(III)/ Cr(II) couple in aqueous media has been studied by a number of workers mostly on Hg surfaces [see, e.g., Ref. (5)(6)(7)(8)(9)(10)(11)]. The reduction of Cr(H20)63+ involves high overpotentiats (--0.5V) (5,18).…”

“…(5)(6)(7)(8)(9)(10)(11)]. The reduction of Cr(H20)63+ involves high overpotentiats (--0.5V) (5,18). The presence of chloride or other halides coordinated to the Cr(III) center, however, greatly increases the rates of electron transfer both homogeneously (12,13), and heterogeneously (5-11, 14, 15).…”