Incorporating Al 3+ within α-Ni(OH) 2 nanosheets provides higher capacity in Ni–Zn cells with phase stability upon cycling compared to the other tested divalent substituents and unsubstituted α-Ni(OH) 2 .
Hydrous cobalt–iridium oxide two-dimensional nanoframes consist of interconnected Co–Ir alloy domains within an unsupported, carbon-free, porous nanostructure and exhibit a higher oxygen evolution activity and similar stability compared to IrO2.