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Issue 15, 2017
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Formation of Rh islands on Pd-supported α-Fe2O3 (0001)

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Abstract

A rhodium ultra-thin film was deposited on a Pd-supported α-Fe2O3 (0001) film by molecular beam epitaxy (MBE). The surface atomic and electronic structures were studied using X-ray photoelectron diffraction (XPD), X-ray photoelectron spectroscopy (XPS), and low energy electron diffraction (LEED). For an oxide thin film (∼16.5 Å), an ordered (√3 × √3)R30° structure was observed. The multiple scattering calculation approach combined with a genetic algorithm for surface structure optimization was used to investigate precisely the atomic structure of the oxide support as well as the Rh nanoislands or nanoparticles (NPs). Rh exhibited 3D growth on an α-Fe2O3 thin film forming NPs with a lattice constant expanded by 5.26% relative to the Rh bulk value. The coexistence of 60° rotated domains and also evidence of Fe termination at the surface of α-Fe2O3 were observed.

Graphical abstract: Formation of Rh islands on Pd-supported α-Fe2O3 (0001)

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Publication details

The article was received on 01 Dec 2016, accepted on 14 Mar 2017 and first published on 15 Mar 2017


Article type: Paper
DOI: 10.1039/C6CE02485H
Citation: CrystEngComm, 2017,19, 2089-2095
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    Formation of Rh islands on Pd-supported α-Fe2O3 (0001)

    A. Pancotti, G. J. P. Abreu, J. L. Wang, A. V. M. Ferreira, R. Landers and A. de Siervo, CrystEngComm, 2017, 19, 2089
    DOI: 10.1039/C6CE02485H

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