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The layered structures determined by Dionigi and co‐workers for Ni, NiFe, and CoFe‐LDH. [25] Hydrogen bonds are shown as dashed lines. a) The alpha structure with intercalated water and carbonate (M8CO3(OH)16⋅4 H2O) that is present at potentials below the OER onset. b) The deprotonated gamma structure with intercalated water and potassium M8K2O16⋅4 H2O that forms under OER conditions and is the OER catalytically active phase.
