Adsorbate-driven reactive interfacial Pt-NiO_1-x nanostructure formation on the Pt₃Ni(111) alloy surface.

ABSTRACT: The origin of the synergistic catalytic effect between metal catalysts and reducible oxides has been debated for decades. Clarification of this effect, namely, the strong metal-support interaction (SMSI), requires an understanding of the geometric and electronic structures of metal-metal oxide interfaces under operando conditions. We show that the inherent lattice mismatch of bimetallic materials selectively creates surface segregation of subsurface metal atoms. Interfacial metal-metal oxide nanostructures are then formed under chemical reaction environments at ambient pressure, which thus increases the catalytic activity for the CO oxidation reaction. Our in situ surface characterizations using ambient-pressure scanning tunneling microscopy and ambient-pressure x-ray photoelectron spectro

SUBMITTER: Kim J 

PROVIDER: S-EPMC6044734 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature