Co-Ni CARBONATE HYDROXIDE NANONEEDLES SELF-SUPPORTED ON Ni FOAM AS A BIFUNCTIONAL CATALYST FOR OVERALL WATER SPLITTING

High performance non-noble bi-functional electrocatalysts are highly demanded towards low-cost water splitting. Herein, Co-Ni carbonate hydroxide nanoneedles self-supported on Ni foam were prepared by a facile hydrothermal method. When it is assembled as the cathode and the anode in a two-electrode configuration, the combined cell demonstrates excellent catalysis performance, with a current density of 10 mA cm-2 at 1.62 V, due to the one-dimensional shape and hybrid amorphous/crystalline structure of Co-Ni carbonate hydroxide.