Alkaline Water Oxidation Using a Bimetallic Phospho-Boride Electrocatalyst.

New oxygen evolution reaction (OER) electrocatalysts based on low-cost elements, which set new benchmark levels of activity, are vital if water electrolysis is to be applied on a global scale. Herein, a low-cost bimetallic phospho-boride catalyst was developed that showed outstanding OER activity of approximately 195 mV to achieve 10 mA cm in alkaline water electrolysis, with a minimal catalyst loading of 0.3 mg cm .