Multi-metallic Hydrate Hollow Structures in Cobalt Hydrate Based Systems

The preparation and analysis of Ni doped Co1–xNix(OH)2 (x = 0.6–0.8) nanorings are reported as produced using core–shell structured Co0.9Ni0.1(OH)2 nanodiscs as a starting template material. The resulting structure and elemental distribution were analyzed to investigate the transformation from discs to rings. A representative example involving the doping of Cu in the Co–Cu hydrate system is also presented.