Preparation of a simple and low cost catalyst with sodium dodecyl sulfate modified carbon paste electrode containing nickel for electrocatalytic oxidation of ethylene glycohol

Subject Areas :

بنفشه نوروزی ^{1 *} , زهرا شاکری ²

1 - استادیار شیمی تجزیه، دانشگاه آزاد اسلامی، واحد قائمشهر، گروه شیمی، قائم شهر، ایران
2 - کارشناسی ارشد، دانشگاه آزاد اسلامی، واحد قائمشهر، گروه شیمی، قائم شهر، ایران

Received: 2018-02-26 Accepted : 2018-05-28 Published : 2018-08-23

Keywords: Nickel, Cyclic voltammetry, SDS, Modified electrode, Ethylene glycohol,

Abstract :

In this research work, sodium dodecyl sulfate (SDS( was deposited on the surface of carbon paste electrode by dropping method. Then, the modified carbon paste electrode with SDS containing nickel (Ni/SDS) was prepared by inserting the modified electrode in a solution containing nickel nitrate for 5 minutes and sweeping of the consecutive potential in sodium hydroxide solution. Also, considering the importance of using ethylene glycohol as a proposed source instead of hydrogen and because of its slow kinetic on the bare carbon paste electrode, its oxidation investigated on the above modified electrode. The results showed the electrocatalytic oxidation of ethylene glycol on the surface of carbon paste electrode modified with SDS/Ni. The effect of various parameters on the efficiency of modified electrode was investigated and the optimal conditions were determined. Finally, the reaction rate constant between the chemical redox centers at the modified electrode surface and ethylene glycol was calculated. Simplicity, low cost, and high sensitivity are the outstanding features of the electrode.

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