Issue 26, 2013

Selective molecular adsorption in sub-nanometer cages of a Cu2O surface oxide

Abstract

In this study the identity of diverse adsorption sites on a 5–7 Cu2O/Cu(111) surface oxide structure has been identified. The 5–7 membered rings formed by a topological defect on stoichiometric Cu2O present different electronic structures from the originating hexagonal rings, as shown by combined bias dependent scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. The adsorption of CO as a probe molecule on the 5–7 structure, studied using infrared reflection–absorption spectroscopy (IRRAS), shows the existence of special adsorption sites. By combining experimental and theoretical results, it is determined that CO molecules can be selectively confined inside the 7-membered oxide rings with internal dimensions of ∼0.85 nm, leading to a marked different adsorbate–substrate interaction than in either clean Cu(111) or Cu2O. The implication of these newly discovered sites on the chemistry of copper for catalytic reactions is discussed.

Graphical abstract: Selective molecular adsorption in sub-nanometer cages of a Cu2O surface oxide

Article information

Article type
Paper
Submitted
04 Feb 2013
Accepted
25 Apr 2013
First published
26 Apr 2013

Phys. Chem. Chem. Phys., 2013,15, 10726-10731

Selective molecular adsorption in sub-nanometer cages of a Cu2O surface oxide

K. Mudiyanselage, W. An, F. Yang, P. Liu and D. J. Stacchiola, Phys. Chem. Chem. Phys., 2013, 15, 10726 DOI: 10.1039/C3CP50522G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements