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DFT plane-wave calculations of the Rh/MgO(001) interface
KTH, Superseded Departments, Biotechnology.
2004 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 566, 977-982 p.Article in journal (Refereed) Published
Abstract [en]

The Rh/MgO(001) system has been studied by periodic plane-wave density functional calculations using the VASP code and PAW potentials. Four different adsorption sites (which were reduced to three after optimization) and three different surface coverages were investigated. For the most stable site, above O, the adhesion energy was found to decrease as a function of coverage (from 2.0 to 1.1 eV as the coverage increases from 1/8 to I ML), while the adsorption energy was found to increase with surface coverage. Electron density difference plots were calculated to display some of the electron rearrangement responsible for the Rh-oxide adhesion energy, and the features of the Mg and O adsorption sites were compared.

Place, publisher, year, edition, pages
2004. Vol. 566, 977-982 p.
Keyword [en]
density functional calculations, magnesium oxides, rhodium, chemisorption, electron density, excitation spectra calculations, mgo-supported metals, partial oxidation, rhodium catalysts, synthesis gas, rh catalysts, decomposition, spectroscopy, methane, syngas, co2
Identifiers
URN: urn:nbn:se:kth:diva-23786DOI: 10.1016/j.susc.2004.06.039ISI: 000224238300057OAI: oai:DiVA.org:kth-23786DiVA: diva2:342485
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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