Synthesis of CNTs filled with palladium nanoparticles using a simplified arc discharge in solution method, which are expected to have very high potential for hydrogen storage and sensor applications, has been successfully carried out. Palladium chloride solution of 2mM concentration was prepared by dissolving PdCl2 powder in de-ionized water. Synthesis of CNTs was carried out in a glass container containing the palladium chloride solution. Two graphite electrodes, acted as a cathode and an anode, were immersed in the glass container containing the 2mM PdCl2 solution. The diameters of the graphite rods used for cathode and anode were 3.05 and 12.70 mm, respectively. Palladium nanoparticles encapsulated carbon nanotubes were synthesized from palladium chloride solution through the arc discharge method at a voltage of 28 V with an optimized direct current of 28 A.
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