Hydrogen adsorption on Ru(001) studied by Scanning TunnelingMicroscopy

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The adsorption of hydrogen on Ru(001) was studied by scanning tunneling microscopy at temperatures around 50 K. Hydrogen was found to adsorb dissociatively forming different ordered structures as a function of coverage. In order of increasing coverage {theta} in monolayers (ML) these were ({radical}3 x {radical}3)r30{sup o} at {theta} = 0.3 ML; (2 x 1) at {theta} = 0.50 ML, (2 x 2)-3H at {theta} = 0.75, and (1 x 1) at {theta} = 1.00. Some of these structures were observed to coexist at intermediate coverage values. Close to saturation of 1 ML, H-vacancies (unoccupied three fold fcc hollow Ru ... continued below

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Tatarkhanov, Mous; Rose, Franck; Fomin, Evgeny; Ogletree, D.Frank & Salmeron, Miquel January 18, 2008.

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The adsorption of hydrogen on Ru(001) was studied by scanning tunneling microscopy at temperatures around 50 K. Hydrogen was found to adsorb dissociatively forming different ordered structures as a function of coverage. In order of increasing coverage {theta} in monolayers (ML) these were ({radical}3 x {radical}3)r30{sup o} at {theta} = 0.3 ML; (2 x 1) at {theta} = 0.50 ML, (2 x 2)-3H at {theta} = 0.75, and (1 x 1) at {theta} = 1.00. Some of these structures were observed to coexist at intermediate coverage values. Close to saturation of 1 ML, H-vacancies (unoccupied three fold fcc hollow Ru sites) were observed either as single entities or forming transient aggregations. These vacancies diffuse and aggregate to form active sites for the dissociative adsorption of hydrogen.

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  • Journal Name: Surface Science; Journal Volume: 602; Related Information: Journal Publication Date: 2008

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  • Report No.: LBNL--63781
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1016/j.susc.2007.10.042 | External Link
  • Office of Scientific & Technical Information Report Number: 929060
  • Archival Resource Key: ark:/67531/metadc898749

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  • January 18, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 3:51 p.m.

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Tatarkhanov, Mous; Rose, Franck; Fomin, Evgeny; Ogletree, D.Frank & Salmeron, Miquel. Hydrogen adsorption on Ru(001) studied by Scanning TunnelingMicroscopy, article, January 18, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc898749/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.