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Issue 6, 2019
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Under-cover stabilization and reactivity of a dense carbon monoxide layer on Pt(111)

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Abstract

The space between a metal surface and a two-dimensional cover can be regarded as a nanoreactor, where confined molecule adsorption and surface reactions may occur. In this work, we report CO intercalation and reactivity between a graphene-hexagonal boron nitride (h-BNG) heterostructure and Pt(111). By employing high resolution X-ray photoemission spectroscopy (XPS) we demonstrate the molecular intercalation of the full h-BNG overlayer and stabilization of a dense Image ID:c8sc04461a-t1.gifR23.4°–13CO layer on Pt(111) under ultra-high vacuum at room temperature. We provide experimental evidence of a weakened CO–metal bond due to the confinement effects of the 2D cover. Temperature-programmed XPS results reveal that CO desorption is kinetically delayed and occurs at a higher temperature than on bare Pt(111). Moreover, CO partially reacts with the h-BNG layer to form boron-oxide species, which affect repeated CO intercalation. Finally, we found that the properties of the system towards interaction with CO can be considerably recovered using high temperature treatment.

Graphical abstract: Under-cover stabilization and reactivity of a dense carbon monoxide layer on Pt(111)

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Supplementary files

Article information


Submitted
08 Oct 2018
Accepted
01 Dec 2018
First published
03 Dec 2018

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 1857-1865
Article type
Edge Article

Under-cover stabilization and reactivity of a dense carbon monoxide layer on Pt(111)

I. Píš, E. Magnano, S. Nappini and F. Bondino, Chem. Sci., 2019, 10, 1857 DOI: 10.1039/C8SC04461A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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