Furthermore, an alkaline seawater electrolyzer employing the non-precious-metal catalysts demonstrates better performance (1.625 V at 10 mA/cm 2) than one employing precious metal ones (1.653 V at 10 mA/cm 2). Furthermore, the measured potential of the electrocatalyst ((Co,Fe)PO 4) at a constant current density of −100 mA/cm 2 remains very stable without noticeable degradation for 72 h during the continuous operation in alkaline natural seawater, demonstrating its suitability for seawater applications. (Co,Fe)PO 4 demonstrates high HER activity and durability in alkaline natural seawater (1 M KOH + seawater), delivering a current density of 10 mA/cm 2 at an overpotential of 137 mV. Herein we report the phosphidation-based synthesis of a cobalt–iron–phosphate ((Co,Fe)PO 4) electrocatalyst for hydrogen evolution reaction (HER) toward alkaline seawater splitting. Highly active and durable electrocatalysts are required to sustain seawater splitting. Seawater splitting represents an inexpensive and attractive route for producing hydrogen, which does not require a desalination process.

Hearts of iron 4 forum