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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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Publication details

The article was received on 08 Oct 2018, accepted on 01 Dec 2018 and first published on 03 Dec 2018


Article type: Edge Article
DOI: 10.1039/C8SC04461A
Citation: Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY license
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    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, Advance Article , DOI: 10.1039/C8SC04461A

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