Binder-Free Spinel Co₂CuO₄ Nanosheet Electrodes with Cu-Driven Kinetic Enhancement for Alkaline OER Applications.

ABSTRACT: Developing electrocatalysts that are efficient and durable for the oxygen evolution reaction (OER) is essential for improving the energy efficiency of alkaline water splitting. Spinel-type transition-metal oxides have emerged as promising non-noble alternatives; however, their catalytic performance is often limited by sluggish charge transport and insufficient utilization of active sites. Herein, we present a systematic comparative study of electrodeposited Co₃O₄ (CO-300) and Cu-substituted Co₂CuO₄ (CCO-300) nanosheet films directly grown on Ni foam. Structural, morphological, and spectroscopic analyses reveal that Cu²⁺ integration into Co-oxide spinel lattice modifies the local electronic environment and produces a more open and inter

SUBMITTER: Ahmed ATA 

PROVIDER: S-EPMC12842824 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature