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Electrochemical reduction of Rh(bpy)(3+)(3) at Hg/phosphate electrolyte interface (CROSBI ID 119783)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Mandić, Zoran ; Gašparović, Blaženka ; Weitner, Zlatko Electrochemical reduction of Rh(bpy)(3+)(3) at Hg/phosphate electrolyte interface // Journal of electroanalytical chemistry (1992), 587 (2006), 2; 314-322. doi: 10.1016/j.jelechem.2005.11.031

Podaci o odgovornosti

Mandić, Zoran ; Gašparović, Blaženka ; Weitner, Zlatko

engleski

Electrochemical reduction of Rh(bpy)(3+)(3) at Hg/phosphate electrolyte interface

The electrochemical reduction of tris(2, 2'- bipyridine)rhodium(III), Rh(bpy)33+, in phosphate buffer solutions was investigated by cyclic voltammetry, alternating current voltammetry, chronoamperometry and exhaustive electrolysis. The cyclic voltammograms exhibit a series of sharp peaks indicating surface confined processes. The major features of the electroreduction are strong adsorption of Rh(bpy)33+, participation of mercury in the electroreduction process and the simultaneous loss of bipyridine ligand. The complex forms condensed layer in a narrow potential region around -0.8 V vs. Ag/AgCl. The chemical bond between Rh(bpy)33+ and mercury is required for the formation of binuclear complex of rhodium(II), [Rh2bpy3(H2O)Cl]3+, at the potentials about – 0.9 V. At the potential of – 1.1 V further reduction of [Rh2bpy3(H2O)Cl]3+ leads to the concomitant oxidation of the mercury electrode, resulting in a mixed Rh(I)- Hg(II) complex and elemental rhodium deposited on the electrode.

tris(2 ; 2'-bipyridine)rhodium(III) ; cyclic voltammetry ; mixed Hg-Rh complex ; electroreduction ; condensed layer formation

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Podaci o izdanju

587 (2)

2006.

314-322

objavljeno

1572-6657

1873-2569

10.1016/j.jelechem.2005.11.031

Povezanost rada

Kemija, Kemijsko inženjerstvo

Poveznice
Indeksiranost