Naslov
Electrochemical processes of sulfide in NaCl electrolyte solutions on mercury electrode

Autori
Krznarić, Damir ; Ciglenečki-Jušić, Irena

Izvornik
Electroanalysis (1040-0397) 17 (2005), 14; 1317-1324

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

Ključne riječi
Sulfide; Hg electrode; NaCl electrolyte

Sažetak
The electrochemical processes of sulfide in NaCl electrolyte solutions were studied using stripping cyclic voltammetry, differential capacity and chronoamperometric measurements. Some new effects were observed and are here discussed. At potentials around -0.1 to -0.3 V a pair of Faradaic adsorptive peaks, which can only be observed in the presence of chloride, is attributed to the formation of HgCl42- ion from the deposited layer of HgS. A second pair of peaks of purely capacitive character was observed at -0.4 V. This is the result of the reorientation and partial desorption or transformation of HgS layers. The formation and dissolution of HgS layers on mercury has been well investigated previously. We observed some new effects after depositing approximately ten layers of HgS and attributed this to the formation of polysulfides at positive potentials.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija

POVEZANOST RADA