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Journal of the Serbian Chemical Society
2007, vol. 72, br. 10, str. 993-1002
jezik rada: engleski
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doi:10.2298/JSC0710993S

Priprema i karakterizacija elektrode na bazi karbonske paste modifikovane jonima kalaja i heksacijanoferata
Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran

e-adresa: rezasabzi@yahoo.com

Sažetak

Elektrode na bazi karbonske paste su hemijski modifikovane kalaj(II) ili kalaj(IV) hloridom i heksacijanoferat(II) ili heksacijanoferat(III) jonom. Njihovo elektrohemijsko ponašanje je ispitivano cikličnom voltametrijom. Pokazano je da Sn(IV) i heksacijanoferat(II) daju najbolje rezultate. Ciklični voltamogram takve SnHCF elektrode je okarakterisan jednim parom pikova: anodnim na 0,195 V i katodnim na 0,154 V (prema ZKE) pri brzini linearne promene potencijala 20 mV s-1 i u 0.5 M fosfatnom puferu kao osnovnom elektrolitu. Tokom cikliziranja potencijala elektroda se pokazala kao veoma stabilna. Ispitivan je efekat pH osnovnog elektrolita i prisutnih katjona alkalnih metala na elektrohemijske karakteristike SnHCF elektrode. Utvrđeno je da katjoni imaju značajan efekat. Određeni su koeficijenti difuzije hidratisanih jona K+ and Na+ u filmu, koeficijent prelaza i konstanta brzine prelaza elektrona.

Ključne reči

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