Recovery of nickel from anode materials of spent Ni-MH batteries and its catalytic property for CH₄ dry reforming

Recovery process of Ni from anode materials of spent Ni-MH batteries and application of the resulting Ni to CH₄ dry reforming catalyst were investigated, focusing on availability of Ni. NiO, which formed a solid solution with CoO, was successfully prepared from the waste by a series of chemical processes using aqueous solutions of HCl and NH₃. The resulting NiO, which was reduced to Ni⁰, exhibited excellent CH₄ conversion in CH₄ dry reforming. From results, it was concluded that the Ni recovered from anode materials of spent Ni-MH batteries was available for CH₄ dry reforming catalyst.