Release time:2024-12-24  Hits:

• Key Words:HYDROGEN EVOLUTION; OXYGEN EVOLUTION; STABLE ELECTROCATALYST; RUTHENIUM ALLOY; CATALYSTS; OXIDE; REDUCTION; STATES
• Abstract:Seawater electrolysis plays a pivotal role in advancing sustainable hydrogen production. High entropy alloys (HEAs), an innovative class of materials, have garnered significant attention for seawater electrolysis research in recent years due to their exceptional mechanical strength, catalytic efficiency, and corrosion resistance properties. This study presents the synthesis of a novel Ni-Fe-Cu-Mo-Mn based high entropy alloy catalyst featuring in-situ grown high entropy oxides (HEOs). This material exhibits HER overpotentials of eta(10) (Overpotential at 10 mA)=50.5 mV in 1 M KOH solution and eta(10) = 371 mV in natural seawater with a pH approximate to 8.2, after 50 h of Hydrogen evolution reactio (100 mA<middle dot>cm(-2)), the eta 10 in seawater decreased from 371 mV to 343 mV. Demonstrates some autocatalytic capacity. Analytical results indicated that the HEOs/NFCMM (NiFeCuMoMn) -HEA surface is characterized by a spinel structure. The presence of this spinel-structured HEOs layer on the HEOs/NFCMM-HEA catalyst's surface enhances its ability to adsorb H2O effectively and facilitates the desorption of H* from non-acidic electrolytes, thereby significantly boosting the HER process.
• Volume:506
• Issue:
• Translation or Not:no