Format

Send to

Choose Destination
Nat Commun. 2018 Oct 2;9(1):4034. doi: 10.1038/s41467-018-06503-8.

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

Author information

1
Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA.
2
Department of Applied Physics, Stanford University, Stanford, CA, 94305, USA.
3
Department of Materials Science and Engineering, Drexel University, Philadelphia, PA, 19104, USA.
4
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
5
Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, 14853, USA.
6
Department of Materials Science and Engineering, Cornell University, Ithaca, NY, 14853, USA. jsuntivich@cornell.edu.
7
Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, NY, 14853, USA. jsuntivich@cornell.edu.

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 La2/3Sr1/3MnO3, 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 underneath a LaMnO3 overlayer allows the catalyst to maintain the surface site availability while benefiting from improved electronic effects. The results show the promise of advanced thin-film deposition for realizing atomically precise catalysts, in which the surface and sub-surface structure and stoichiometry are tailored for functionality, over controlling only bulk compositions.

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center