The electrodeposition of aluminum-manganese alloys from room-temperature cholroaluminate molten salts

摘要

The electrochemical reduction of manganese (II) in acidic AlCl_3:EMIC (aluminum chloride: 1-ethy1-3-methylimidazolium chloride) room temperature molten salt results in codeposition of aluminum and manganese. Constant potential deposition in the region of the reduction peak results in the deposition of manganese rich amorphous manganese-aluminum alloys. Constant potential deposition in the region of diffusion control results in the formation of aluminum rich amorphous manganese-aluminum alloys. Evaluation of the chronoamperometric transient behavior on platinum during electrodeposition at the foot of the wave shows that the codeposition of manganese and aluminum proceeds via three-dimensional instantaneous nucleation with diffusion controlled growth.