Nickel sulfide wrapped by porous cobalt molybdate nanosheet arrays grown on Ni foam for oxygen evolution reaction and supercapacitor

Ultrathin Co-Mo-O nanosheet arrays were in-situ grown on Ni foam into 3D porous architecture with Ni3S2 entrapped on Ni support, which exhibits electrocatalytic activity for OER (η50 = 0.29 V), and demonstrates a specific capacity of 340 mAh g−1 at 2 mA cm−2 with good capability (82.1% of the retention at 32 mA cm−2) in KOH solution with good durability in 12 h-electrolysis experiment and 10000 charge-discharge cycles.359