Creating single-atom Pt-ceria catalysts by surface step decoration

Filip Dvořák; Matteo Farnesi Camellone; Andrii Tovt; Nguyen-Dung Tran; Fabio R. Negreiros; Mykhailo Vorokhta; Tomas Skala; Iva Matolínová; Josef Mysliveček; Vladimír Matolín; Stefano Fabris

doi:10.1038/ncomms10801

journal article Open Access Feb 24, 2016

Creating single-atom Pt-ceria catalysts by surface step decoration

Filip Dvořák Matteo Farnesi Camellone

Andrii Tovt Nguyen-Dung Tran Fabio R. Negreiros Mykhailo Vorokhta Tomas Skala

Iva Matolínová

Josef Mysliveček Vladimír Matolín Stefano Fabris

Nature Communications Vol. 7 No. 1 · Springer Science and Business Media LLC

View at Publisher Save 10.1038/ncomms10801

Abstract

AbstractSingle-atom catalysts maximize the utilization of supported precious metals by exposing every single metal atom to reactants. To avoid sintering and deactivation at realistic reaction conditions, single metal atoms are stabilized by specific adsorption sites on catalyst substrates. Here we show by combining photoelectron spectroscopy, scanning tunnelling microscopy and density functional theory calculations that Pt single atoms on ceria are stabilized by the most ubiquitous defects on solid surfaces—monoatomic step edges. Pt segregation at steps leads to stable dispersions of single Pt2+ ions in planar PtO4 moieties incorporating excess O atoms and contributing to oxygen storage capacity of ceria. We experimentally control the step density on our samples, to maximize the coverage of monodispersed Pt2+ and demonstrate that step engineering and step decoration represent effective strategies for understanding and design of new single-atom catalysts.

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References

Details

Published: Feb 24, 2016
Vol/Issue: 7(1)
License: View

Authors

F

Filip Dvořák

M

Matteo Farnesi Camellone

CNR-IOM, Consiglio Nazionale delle Ricerche − Istituto Officina dei Materiali, c/o SISSA, 34136 Trieste, Italy

Cite This Article

Filip Dvořák, Matteo Farnesi Camellone, Andrii Tovt, et al. (2016). Creating single-atom Pt-ceria catalysts by surface step decoration. Nature Communications, 7(1). https://doi.org/10.1038/ncomms10801

Creating single-atom Pt-ceria catalysts by surface step decoration

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