Hydrous cobalt-iridium oxide two-dimensional nanoframes: insights into activity and stability of bimetallic acidic oxygen evolution electrocatalysts.

ABSTRACT: Acidic oxygen evolution reaction (OER) electrocatalysts that have high activity, extended durability, and lower costs are needed to further the development and wide-scale adoption of proton-exchange membrane electrolyzers. In this work, we report hydrous cobalt-iridium oxide two-dimensional (2D) nanoframes exhibit higher oxygen evolution activity and similar stability compared with commercial IrO₂; however, the bimetallic Co-Ir catalyst undergoes a significantly different degradation process compared with the monometallic IrO₂ catalyst. The bimetallic Co-Ir 2D nanoframes consist of interconnected Co-Ir alloy domains within an unsupported, carbon-free, porous nanostructure that allows three-dimensional molecular access to the catalytically active surface sites. After e

SUBMITTER: Ying Y 

PROVIDER: S-EPMC9419543 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature