Carbon Embedding of Pt Cluster Superlattices Templated by Hexagonal Boron Nitride on Ir(111)

Tobias Hartl*, Moritz Will, Pantelis Bampoulis, Daniel Herrmann, Philipp Valerius, Charlotte Herbig, Virginia Boix de la Cruz, Paolo Lacovig, Vedran Vonk, Simon Chung, Andreas Stierle, Silvano Lizzit, Jan Knudsen, Thomas Michely

*Corresponding author for this work

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With the goal to delevop the fabrication of a new type of Pt-nanoparticle carbon-support electrocatalyst, we investigate the carbon embedding of Pt cluster superlattices grown on the moiré of a monolayer of hexagonal boron nitride (h-BN) on Ir(111). Our combined scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) study establishes conformal C embedding of the Pt clusters on h-BN/Ir(111) without deterioration of superlattice order, preferential and strong binding of the embedding carbon to the Pt clusters, and upon annealing the formation of a homogeneous amorphous carbon (a-C) matrix. There are indications that while the a-C matrix and the Pt clusters bind strongly to each other, upon annealing both weaken their binding to h-BN.

Original languageEnglish
Pages (from-to)23435-23444
Number of pages10
JournalThe Journal of physical chemistry C
Issue number42
Early online date19 Oct 2021
Publication statusPublished - 28 Oct 2021

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