Oxygen vacancy-rich amorphous porous NiFe(OH)_x derived from Ni(OH)_x/Prussian blue as highly efficient oxygen evolution electrocatalysts

Abstract

Oxygen vacancy-rich amorphous porous NiFe(OH)_x on carbon paper is prepared through a two-step electrochemical depostion of Prussian blue nanocrystal layer and Ni(OH)_x layer followed by an alkaline etching process for efficient OER catalysis.