Bi-functional RuO2–Co3O4 core–shell nanofibers as a multi-component one-dimensional water oxidation catalyst.

The core–shell structure of RuO₂–Co₃O₄ fibers comprising the inner region of highly conductive RuO₂ and the outer region of catalytic Co₃O₄ provided a fast and effective transport pathway for holes to O₂-evolving sites, leading to a highly efficient water oxidation performance. [ABSTRACT FROM AUTHOR]