Ni–Al Layered Double Hydroxide Prepared by Liquid Phase Deposition

Abstract

Abstract Al-containing nickel layered double hydroxide was prepared by liquid phase deposition (LPD) using aluminum metal or compounds as the fluorine scavenger in the equilibrium reaction of nickel–fluorine complex ion. The obtained phases depend on the Al content when it is solely used as F− scavenger; α-nickel hydroxide is the predominant phase and a small amount of β-phase is detected. In contrast pure Ni–Al LDH/C composites, isostructural and isomorphic to α-Ni(OH)2 are obtained at any range of Al content from 0 to ca. 30 mol % of [Al]⁄[Al+Ni]. High stability of LDH in 6 M aqueous KOH solution was performed because of low impurity of cation species.