Two orders of magnitude enhancement in oxygen evolution reactivity on amorphous Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ nanofilms with tunable oxidation state.

ABSTRACT: Perovskite oxides exhibit potential for use as electrocatalysts in the oxygen evolution reaction (OER). However, their low specific surface area is the main obstacle to realizing a high mass-specific activity that is required to be competitive against the state-of-the-art precious metal-based catalysts. We report the enhanced performance of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ (BSCF) for the OER with intrinsic activity that is significantly higher than that of the benchmark IrO₂, and this result was achieved via fabrication of an amorphous BSCF nanofilm on a surface-oxidized nickel substrate by magnetron sputtering. The surface nickel oxide layer of the Ni substrate and the thickness of the BSCF film were further used to tune the intrin

SUBMITTER: Chen G 

PROVIDER: S-EPMC5479656 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature