Highly efficient oxygen evolution catalysis achieved by NiFe oxyhydroxide clusters anchored on carbon black

The NiFe-oxyhydroxide/C OER catalyst is prepared through the hydrolysis of nickel and iron salts in the presence of carbon black. It exhibits an overpotential of 269.6 mV at 10 mA cm −2 and a mass activity of 593.1 A g −1 at an overpotential of 320 mV.