Publication date: 15th December 2025
Electrodeposition provides a scalable and compositionally tunable approach for fabricating alloyed catalytic surfaces suitable for diverse electrochemical applications. In this work, CuNiCo and CuZnNi ternary alloy thin films were electrodeposited on graphite substrates and systematically optimized for the hydrogen evolution reaction (HER). A Hull cell configuration was employed to evaluate current density distributions and identify deposition conditions leading to uniform, adherent, and compositionally balanced films. The effects of key deposition parameters—precursor concentration, bath pH, applied current density, and additive content—were investigated to establish optimal conditions for high-performance catalyst formation.
The structural and compositional characteristics of the films were examined using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray absorption near-edge structure (XANES) spectroscopy. Electrochemical activity was evaluated through cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronopotentiometry. The ternary alloys exhibited enhanced HER activity compared to their binary counterparts, attributed to synergistic interactions between Cu, Ni, and the third metallic component, which modulate surface energy and electronic structure. Notably, the catalysts also displayed favorable behavior toward CO₂ reduction, underscoring their multifunctionality across key energy conversion reactions.
This study demonstrates the potential of electrodeposited Cu-based ternary alloys as cost-effective and tunable electrocatalysts for sustainable hydrogen and carbon conversion processes, offering insights into composition–structure–activity relationships essential for next-generation catalyst design.
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