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231223s2005 xx ||||| 00| ||eng c |
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|a DE-627
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|a eng
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|a Gutiérrez de Dios, F Javier
|e verfasserin
|4 aut
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|a Preparation and electrochemical behavior of ordered rh adlayers on Pt(100) electrodes
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|c 2005
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 22.06.2006
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|a Date Revised 26.07.2005
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a Rhodium adlayers on Pt(100) substrates have been prepared by electrodeposition from dilute Rh(III) acidic solutions. The initially disordered layer is electrochemically annealed by applying a polarization program consisting of high-sweep-rate multicycle sequences between 0.05 and 0.78 V(RHE) in 0.1 M H(2)SO(4). In this way, a pseudomorphic Rh monolayer can be prepared on Pt(100) substrates. The degree of order of the electrochemically annealed layer has been evidenced not only through voltammetric experiments but also by means of scanning tunneling microscopy with atomic resolution for iodine-protected adlayers, which show a c(2 x 2) structure. The electrochemically induced ordering of the Rh adlayer appears to be a consequence of the repeated cycles of adsorption/desorption of H and, especially, oxygenated species. Voltammetry in sulfuric acid solutions permits examination of the energetics of H/anions and OH/O adsorption as a function of the Rh coverage. The first monolayer adsorbs both hydrogen and oxygenated species more strongly than the second one. This can be explained through an electronic effect caused by the underlying Pt(100) substrate
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|a Journal Article
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1 |
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|a Gómez, Roberto
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Feliu, Juan M
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 21(2005), 16 vom: 02. Aug., Seite 7439-48
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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| 773 |
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|g volume:21
|g year:2005
|g number:16
|g day:02
|g month:08
|g pages:7439-48
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|a AR
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|d 21
|j 2005
|e 16
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|h 7439-48
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