Study on the One‐Step Synthesis of Oxides by Cationic Membrane Electrolysis of Ni and Co Chloride.

This contribution investigates whether cobalt(II) and nickel(II) chlorides can, in one step, be converted to their corresponding oxides in aqueous solutions by electrodeposition. We use the chemical precipitation method as a blank experiment, and the electrodeposition is carried out directly in a self‐made electrolytic cell with CoCl2 ⋅ 6H2O or NiCl2 ⋅ 6H2O as raw material. The crystal structure, morphology, and specific surface area of the product are characterized by X‐ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TG), and Brunauer‐Emmett‐Teller (BET) measurements. The results show that the existence of an electric field has an obvious influence on the performance of the product. CoCl2 can realize the one‐step preparation of Co3O4 in an aqueous solution, but the product prepared with NiCl2 as the raw material is Ni(OH)2, which needs to be further calcined to obtain NiO. Therefore, it is necessary to further study the prerequisites for the one‐step preparation of oxides from metal chloride in an aqueous solution. [ABSTRACT FROM AUTHOR]

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