Stabilizing oxygen intermediates on redox-flexible active sites in multimetallic Ni–Fe–Al–Co layered double hydroxide anodes for excellent alkaline and seawater electrolysis

Quaternary multimetallic LDHs have been developed through a facile metal–organic-framework derived electrochemical activation process. Ni–Fe–Al–Co quaternary LDHs show one of the best OER performances in alkaline and seawater electrolytes.