Oxygen evolution reaction on electroless nickel alloy films.

The oxygen evolution reaction (OER) on nickel alloy films (nickel, electroless Ni-B and electroless Ni-P) in 1mol dm-3 KOH solution was investigated by electrochemical techniques, specifically an impedance method using the fast Fourier transform (FFT). The OER on electroless Ni-B electrode showed the highest electrocatalytic activity in the high overpotential region, while that on electroless Ni-P electrode gave the lowest activity. The capacitance component (Cp) due to adsorbed intermediate had a strong correlation with the OER catalytic order, with electroless Ni-B electrode giving higher Cp values in all overpotential regions.