The Malaysian Journal of Analytical Sciences Vol 10 No 1 (2006): 149 – 156

 

 

 

 

KAJIAN ELEKTROKINETIK ELEKTROD PEPEJAL UNTUK ELEKTROOKSIDASI ETANOL DALAM LARUTAN KALIUM HIDROKSIDA

 

Riyanto, Jumat Salimon, Mohd Rozali Othman

 

Makmal Elektrosintesis,

Pusat Pengajian Sains Kimia dan Teknologi Makanan

Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia

43600, Bangi, Selangor Darul Ehsan, Malaysia

 

Abstract

Studies on the electrooxidation of ethanol using solid electrode (Ni, Cu, Co, Pt and Ir) in KOH as supporting electrolyte were performed to determine a few kinetic parameters like Tafel slope (b), reaction rate constant (a) and exchange current density (i0) using linear potential (V) method. Value of several kinetic parameters for every elements (electrodes) were determined using a graph plots between log io   vs potential. Referring to i0  value in 0.1 M KOH the electrocatalitic capability sequences obtained were Co > Cu > Ir > Ni at lower potential and Ir > Ni > Co > Cu > Pt at higher potential, while in 1.0 M KOH its sequences were Co >  Ni >  Cu >  Ir   and Ni >  Co >  Ir >  Cu >  Pt and lower and at higher potential respectively.

 

Keywords: Electrokinetic,  solid electrode, electrocatalytic, ethanol, KOH

 

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