“…It is imperative to explore non-noble metal alternatives with powerful catalytic capability and durability. [13][14][15] Anionic intercalation hydroxides comprising transitionmetal elements e.g. titanium, cobalt, iron, nickel, magnesium or zinc, [16][17][18] have aroused great interest due to their adjustable compositions, easy recombination, and superior ion-adsorption capacity.…”