Hierarchical Core-Shell Cu@Cu-Ni-Co Alloy Electrocatalyst for Efficient Hydrogen Evolution in Alkaline Media

Energies, Год журнала: 2025, Номер 18(6), С. 1515 - 1515

Опубликована: Март 19, 2025

The development of advanced electrocatalysts plays a pivotal role in enhancing hydrogen production through water electrolysis. In this study, we employed two-step electrodeposition method to fabricate 3D porous Cu-Co-Ni alloy with superior catalytic properties and long-term stability for evolution reaction (HER). resulting trimetallic alloy, Cu@Cu-Ni-Co, demonstrated significant improvements structural integrity performance. A comparative analysis electrocatalysts, including Cu, Cu@Ni-Co, revealed that Cu@Cu-Ni-Co achieved the best results alkaline media. Electrochemical tests conducted 1.0 M NaOH showed reached current density 10 mA cm−2 at low overpotential 125 mV, along Tafel slope 79.1 mV dec−1. catalyst exceptional durability, retaining ~95% its initial after 120 h continuous operation high densities. Structural confirmed enhanced performance arises from synergistic interaction between Ni, Co within well-integrated framework. This integration large electrochemical active surface area (ECSA) 380 cm2 charge transfer resistance (15.76 Ω), facilitating efficient electron promoting HER activity. These findings position as highly stable electrocatalyst conditions.

Язык: Английский

Advancements in electrolyser stack performance: A comprehensive review of Latest technologies and efficiency strategies

International Journal of Hydrogen Energy, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский