Silicon atom doping in heterotrimetallic sulfides for non-noble metal alkaline water electrolysis

The engineering of a pentlandite (Fe 3 Co 3 Ni 3 S 8 , FCNS) doped with silicon (FCNSSi) for water splitting is demonstrated. At 500 mA cm −2 , a two-electrode zero-gap cell assembly demonstrates the FCNSSi catalyst's promise for practical applications.