Diffusion Coefficients of Tris(β-diketonato)ruthenium Complexes of Different Charge Numbers in Acetonitrile Solutions, Measured by Chronoamperometry

Measurement of the diffusion coefficients of [Ru(NH3)6]3+ and [Ru(NH3)6]2+ in aqueous solution using microelectrode double potential step chronoamperometry

“…In addition, they also found that in an aqueous solution of TMPD with 0.2 M KCl, the ratio was about 0.96 [12]. Ikeuchi et al measured the Ru(acac) 3 j[Ru(acac) 3 ] + couple in acetonitrile solutions with TBAP and TBAPF 6 separately, and found that the ratios were 0.99 and 1.01 respectively [13].…”

Characterization of Structural and Electronic Transitions During Reduction and Oxidation of Ru(acac)3 Flow Battery Electrolytes by using X‐ray Absorption Spectroscopy

“…Although the short‐term product could be [Ru(acac) 3 ] + based on CV, results from BE suggest a different long‐term product that yields a redox couple at −0.2 V. This product is not the free ligand, as the oxidation of acetylacetone is irreversible, occurring at approximately 0 V versus Ag/Ag + . The peak height of the product suggests a diffusion coefficient that is comparable to that for Ru(acac) 3 in acetonitrile and, based on the Stokes–Einstein equation, this species is similar in size to Ru(acac) 3 . The reversibility of the species giving rise to the couple at −0.2 V was characterized by reducing the electrolyte at −0.5 V, and subsequently oxidizing it at 0.4 V. The BE of this species was very irreversible.…”

Electrochemical and spectroscopic study of vanadyl acetylacetonate–ionic liquids interactions

“…This finding indicates that, in the analyzed system, the addition of ILs results in an enhancement of the VO(acac) 2 mobility, with this effect being more pronounced for IL 5, as compared to IL 3, 4, 6 (which display similar D values). According to the works of Kaintz et al [38] France-Lanord et al [39] and Ikeuchi et al [40] the increased mobility may derive from a reduction of the friction experienced by the redox species, as a result of the formation of ionic couples with the added ILs. The more effective charge stabilization of ILs 3 -6 anions, with respect to the Tf 2 N anions of the supporting electrolyte, could result in the formation of neutral clusters less subjected to the dielectric friction of the surrounding environment.…”