Naslov
Electrochemical Reduction of Selenium(+4) in Acidic Perchlorate Solutions

Autori
Zelić, Marina ; Sipos, Laszlo ; Branica, Marko

Izvornik
Croatica Chemica Acta (0011-1643) 58 (1985), 1; 43-55

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
selenium ; reduction ; polarography ; mercury selenide ; product identification

Sažetak
The mechanism of selenium(+4)electrochemical reduction in acidic perchlorate solutions was studied. Dropping mercury and hanging mercury drop electrodes were used in direct current, alternating current, pulse and differential pulse polarographic and voltammetric measurements. Potentiostatic elextrolysis experiments on mercury electrode were also performed. Precipitates formed on the electrode surface were identified using the x-ray diffraction and x-ray fluorescence. At the mercury electrode surface, depending on selenium concentration in the solution, mercury selenide or elemental selenium was accumulated. The results were greatly influenced by the presence of Hg2+ ions in the perchlorate medium. The potential of the peak is pH dependent. Surface active substances supress the peak height, while the cupric ions significantly enhance it.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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