Enhancement of oxygen evolution performance through synergetic action between NiFe metal core and NiFeOx shell

Abstract

NiFe/NiFeO_x core/shell electrocatalysts show excellent OER activity by taking advantage of the synergetic effect between the metal core and the oxide/hydroxide shell, i.e. the metal core provides good bulk electron conduction and thus extends the OER active sites to the whole oxide/hydroxide shell, and the shell catalyzes the OER and protects the metal core from oxidation.