Tailoring manganese oxide with atomic precision to increase surface site availability for oxygen reduction catalysis.

ABSTRACT: Controlling the structure of catalysts at the atomic level provides an opportunity to establish detailed understanding of the catalytic form-to-function and realize new, non-equilibrium catalytic structures. Here, advanced thin-film deposition is used to control the atomic structure of La_2/3Sr_1/3MnO₃, a well-known catalyst for the oxygen reduction reaction. The surface and sub-surface is customized, whereas the overall composition and d-electron configuration of the oxide is kept constant. Although the addition of SrMnO₃ benefits the oxygen reduction reaction via electronic structure and conductivity improvements, SrMnO₃ can react with ambient air to reduce the surface site availability. Placing SrMnO₃ in the sub-surface und

SUBMITTER: Eom CJ 

PROVIDER: S-EPMC6168596 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature