Release time:2024-12-24  Hits:

• Key Words:高熵合金;电催化;非贵金属;一步电沉积法
• Abstract:High entropy alloys have garnered considerable attention within the realm of electrocatalysis. This study introduces a Ni-Fe-Co-Mn-V high entropy alloy (NFCMV-HEA) electrocatalyst fabricated on a nickel foam substrate via a facile and controlled one-step electrodeposition process. Remarkably, in a 1 M KOH electrolyte, the NFCMV-HEA catalyst exhibits exceptional catalytic efficiency, needing only a mere 7 mV overpotential for hydrogen evolution to reach a current density of 10 mA cm- 2 . Furthermore, the Tafel slope is relatively low at 147.5 mV dec- 1 , suggesting favorable kinetics. The catalyst maintains its performance stability even following an extensive 90 h durability assessment. Further elucidation reveals that the nano-scale resberry-like micro-convex surface structure of the electrodeposited HEA yields a profusion of electrochemically active sites, synergized with the distinctive cocktail effect intrinsic to HEAs, thereby endowing the catalyst with exceptional HER electrocatalytic prowess.
• Volume:42
• Issue:-
• Translation or Not:no