Ultralow-iridium content NiIr alloy derivative nanochain arrays as bifunctional electrocatalysts for overall water splitting.

ABSTRACT: The development of low-cost and high-durability bifunctional electrocatalysts is of considerable importance for overall water splitting (OWS). This work reports the controlled synthesis of nickel-iridium alloy derivative nanochain array electrodes (NiIr_x NCs) with fully exposed active sites that facilitated mass transfer for efficient OWS. The nanochains have a self-supported three-dimensional core-shell structure, composed of a metallic NiIr_x core and a thin (5-10 nm) amorphous (hydr)oxide film as the shell (e.g., IrO₂/NiIr_x and Ni(OH)₂/NiIr_x). Interestingly, NiIr_x NCs have bifunctional properties. Particularly, the oxygen evolution reaction (OER) current density (electro

SUBMITTER: Cai Z 

PROVIDER: S-EPMC10249465 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature