Nanomaterials: Application & Properties, 2018 IEEE 8th International Conference on Nanomaterials: Applications & Properties

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Nickel-Carbon Nanotubes Composite Electrodes for Electrochemical Oxidation of Methanol
Artur Maciej, Ewelina Urbańczyk, Paulina Rzepka, Wojciech Simka

Last modified: 2018-09-10


The direct methanol fuel cells (DMFCs) are attracting energy sources due its high energy conversion efficiency and low pollution [1]. In this fuel cells mainly are use the platinum or platinum-based electrode. However, the application of this material has a number disadvantages such as: high cost or poor stability. Therefore more often are examine the non-platinum catalyst such as nickel-based catalyst [2].

The composite electrodes was made during the electrochemical co-deposition. This process was conducted at 5 A/dm2 and 5 minutes in nickel plating bath (Watts bath) with addition 0.05 and 0.1g/dm3 the multi walled carbon nanotubes. The composite coatings were studied using a scanning electron microscopy with energy dispersive X-ray analysis system. The roughness of the obtained coatings was determined using the profilometer. The composite electrodes were put to the electrochemical measurements. It was performed the cyclic voltammetry and the chronoamperometry in 1 M KOH and 1 M KOH with addition: 0.1; 0.5 and 1 M CH3OH.

The obtained nickel - carbon nanotubes electrodes are characterized by the high developed structure the carbon nanotubes network covered the nickel. The composite electrodes are showed very good electrocatalytic activity in oxidation of methanol. Both in KOH solution and in the solution with the addition of methanol the obtained composites were more active than the nickel electrode. In these investigations the composite electrodes are shown also high stability during methanol oxidation process.