Synthesis of Co/Ni – Hydroxyapatite by electrochemical method

Electrochemical synthesis has been used for in-situ metal-hydroxyapatite production effectively because of the ease of controlling good metal synthesis and dispersion. This condition is very interesting to produce a catalyst in the form of a Co/Ni-hydroxyapatite composite used for hydrogen production from storage as a hydride chemical. The novelty of this research is the electrochemical synthesis of in situ metal-hydroxyapatite catalysts (together with electrochemistry of hydroxyapatite formation and Co/Ni impregnation). The advantages of hydroxyapatite as a catalyst support and electrochemical method in situ were combined in this study. The set of the experimental equppment consist of an electrochemical cell and a DC power supply. The electrochemical cells consist of a 250 ml volume acrylic container containing an electrolyte solution containing NiCl₂ and CoCl₂. This solution is made by dissolving Na₂H₂EDTA.2H2O pro analyzer. Anode and cathode electrodes in the form of a rectangular carbon rod measuring 5.2 cm x 2 cm. The electrochemical cells are connected to a DC power supply which functions to give a potential difference between the two electrodes where the current density can be varied according to the specified variable. The Cobalt / Nickel bi-catalyst with hydroxyapatite was successfully synthesized at 80 mA/ cm² current density and 1 hour time electrolysis at room temperature.