Issue 35, 2016

Factors controlling the CO intercalation of h-BN overlayers on Ru(0001)

Abstract

The space between a two-dimensional (2D) material overlayer and a metal surface can be regarded as a nanoreactor, in which molecule adsorption and surface reaction may occur. In this work, we present CO intercalation under a hexagonal boron nitride (h-BN) overlayer on Ru(0001) at room temperature, observed using X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, and scanning tunneling microscopy. Critical factors influencing the interfacial process have been investigated, including CO partial pressure, h-BN coverage, and oxygen pre-adsorption on the Ru surface. It has been identified that CO adsorption on the bare Ru surface region plays an important role in CO intercalation. Comparative studies of CO intercalation at h-BN/Ru(0001) and graphene/Ru(0001) interfaces indicate that CO starts to intercalate h-BN overlayers more easily than graphene. Temperature-programmed CO desorption experiments from h-BN/CO/Ru(0001) and graphene/CO/Ru(0001) surfaces reveal a similar confinement effect of the 2D cover on CO adsorption, which results in a more abrupt and quick CO desorption in comparison with the CO/Ru(0001) surface.

Graphical abstract: Factors controlling the CO intercalation of h-BN overlayers on Ru(0001)

Supplementary files

Article information

Article type
Paper
Submitted
27 May 2016
Accepted
07 Aug 2016
First published
08 Aug 2016

Phys. Chem. Chem. Phys., 2016,18, 24278-24284

Factors controlling the CO intercalation of h-BN overlayers on Ru(0001)

A. Dong, Q. Fu, H. Wu, M. Wei and X. Bao, Phys. Chem. Chem. Phys., 2016, 18, 24278 DOI: 10.1039/C6CP03660K

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