Growth, Stability, and Electronic Decoupling of Pt Clusters on h‑BN/Ir(111)

Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron nitride (h-BN) with Ir(111). Using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and scanning tunneling spectroscopy, we...

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Published inJournal of physical chemistry. C Vol. 125; no. 7; pp. 3880 - 3889
Main Authors Will, Moritz, Hartl, Tobias, Boix de la Cruz, Virginia, Lacovig, Paolo, Lizzit, Silvano, Knudsen, Jan, Michely, Thomas, Bampoulis, Pantelis
Format Journal Article
LanguageEnglish
Published American Chemical Society 25.02.2021
Subjects
C: Chemical and Catalytic Reactivity at Interfaces
Condensed Matter Physics
Den kondenserade materiens fysik
Fysik
Natural Sciences
Naturvetenskap
Physical Sciences
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Abstract Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron nitride (h-BN) with Ir(111). Using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and scanning tunneling spectroscopy, we provide a comprehensive picture for the mechanism of cluster binding, the thermal stability of clusters, cluster superlattice decay, the morphological evolution of cluster shape with size, and finally Pt cluster decoupling and internal electronic structure. The key findings are that the Pt cluster superlattices on h-BN on Ir(111) are thermally more stable than any other Pt cluster superlattice, are well decoupled from their substrate, and display a discrete cluster height-dependent electronic structure.
AbstractList Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron nitride (h-BN) with Ir(111). Using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and scanning tunneling spectroscopy, we provide a comprehensive picture for the mechanism of cluster binding, the thermal stability of clusters, cluster superlattice decay, the morphological evolution of cluster shape with size, and finally Pt cluster decoupling and internal electronic structure. The key findings are that the Pt cluster superlattices on h-BN on Ir(111) are thermally more stable than any other Pt cluster superlattice, are well decoupled from their substrate, and display a discrete cluster height-dependent electronic structure.
Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron nitride (h-BN) with Ir(111). Using X-ray photoelectron spectroscopy, scanning tunneling microscopy, and scanning tunneling spectroscopy, we provide a comprehensive picture for the mechanism of cluster binding, the thermal stability of clusters, cluster superlattice decay, the morphological evolution of cluster shape with size, and finally Pt cluster decoupling and internal electronic structure. The key findings are that the Pt cluster superlattices on h-BN on Ir(111) are thermally more stable than any other Pt cluster superlattice, are well decoupled from their substrate, and display a discrete cluster height-dependent electronic structure.
Author Knudsen, Jan
Michely, Thomas
Hartl, Tobias
Boix de la Cruz, Virginia
Lacovig, Paolo
Lizzit, Silvano
Will, Moritz
Bampoulis, Pantelis
AuthorAffiliation Elettra-Sincrotrone Trieste S.C.p.A
Lund University
MAX IV Laboratory
Division of Synchrotron Radiation Research
II. Physikalisches Institut
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Snippet Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron...
Motivated by the relevance of Pt clusters in heterogeneous catalysis, ordered Pt cluster superlattices are templated by the moiré of monolayer hexagonal boron...
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SubjectTerms C: Chemical and Catalytic Reactivity at Interfaces
Condensed Matter Physics
Den kondenserade materiens fysik
Fysik
Natural Sciences
Naturvetenskap
Physical Sciences
Title Growth, Stability, and Electronic Decoupling of Pt Clusters on h‑BN/Ir(111)
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