Unlocking the Cu-Co Interplay: Electrodeposited Spinel Co₂CuO₄ as a High-Performance Hydrogen Evolution Catalyst.

ABSTRACT: Developing cost-effective and durable electrocatalysts with high hydrogen evolution efficiency remains a critical challenge for sustainable energy conversion. Herein, spinel-type Co₂CuO₄ and Co₃O₄ nanosheet electrodes were fabricated directly on Ni foam via a simple electrodeposition route and evaluated for the alkaline hydrogen evolution reaction (HER) in 1.0 M KOH. Structural and surface analyses confirmed the formation of phase-pure, porous, and highly interconnected nanosheet architectures, where the substitution of Cu²⁺ into the Co₃O₄ lattice induced charge-redistribution and optimized the electronic configuration. The Co₂CuO₄ catalyst exhibited superior activity, requiring an overpotent

SUBMITTER: Sekar S 

PROVIDER: S-EPMC12653121 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature