Bottom-up precise synthesis of stable platinum dimers on graphene.

ABSTRACT: Supported metal clusters containing only a few atoms are of great interest. Progress has been made in synthesis of metal single-atom catalysts. However, precise synthesis of metal dimers on high-surface area support remains a grand challenge. Here, we show that Pt₂ dimers can be fabricated with a bottom-up approach on graphene using atomic layer deposition, through proper nucleation sites creation, Pt₁ single-atom deposition and attaching a secondary Pt atom selectively on the preliminary one. Scanning transmission electron microscopy, x-ray absorption spectroscopy, and theoretical calculations suggest that the Pt₂ dimers are likely in the oxidized form of Pt₂O_x. In hydrolytic dehydrogenation of ammonia borane, Pt₂ dimers ex

SUBMITTER: Yan H 

PROVIDER: S-EPMC5715161 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature