Ana M. Castro Luna

Redox stability of Re(V)–amine complexes

The complete electrochemical characterization of three amine-related complexes containing the ½ReO2� þ core was achieved by the use of three different electrode materials. The ½Re V O2� þ core, the amine group and iodide were characterized based on the voltammetric behavior on glassy carbon, nickel and gold, respectively. � 2002 Elsevier Science B.V. All rights reserved.

A comparative study of electrochemical and optical properties of rhenium deposited on gold and platinum

Rhenium-containing films were grown on gold and platinum after different potentiostatic and potentiodynamic polarizations in the - 0.20 V to 0.70 V range (vs rhe) in aqueous acid perrhenate. Experimental data were obtained using cyclic voltammetry and ellipsometry, from which the thickness and optical indices of the electrodeposited rhenium layer were calculated. Metallic rhenium deposition on gold takes place at potentials within the hydrogen evolution reaction. Rhenium oxide on platinum is formed in the hydrogen adatom potential domain, whereas metallic rhenium is deposited concurrently with the hydrogen adsorption and evolution reactions on the same metal.

Kinetics of rhenium dioxide deposition on columnar structured platinum electrodes

The kinetics concerning the early stage of the electrodeposition of rhenium dioxide on columnar-structured platinum electrodes from acid aqueous containing perrhenate ions was studied. The results demonstrate a zero-order kinetics obtained by holding the potential at two different values.

Voltammetric Characterization of (ReO) 3+ Containing Complexes

In the present work, the voltammetric profiles of Au-pc in 1 mM solutions of K[Re V OCl2(L)] (L = dianions of H2hida or H2eida; hida, n-(2,6-dimethylphenyl carbamoylmethyl)imino diacetic acid, and eida, 2,6-diethyl ida) complexes were evaluated. The obtained electrochemical response was the result of the contributions coming from the [ReO] 3+ core (Epa at ca. 0.2 V vs. Ag/AgNO3) and the carboxylic group of the ligand. There where also observed redox contributions ascribed to the presence of perrhenate coming from the decomposition of the complex with the lost of ligands, in agreement with the low stability of the studied complexes.