NDLI: Binding energy of ruthenium submonolayers deposited on a Pt(111) electrode

Content Provider	Springer Nature Link
Author	Vericat, C. Wakisaka, M. Haasch, R. Bagus, P. S. Wieckowski, A.
Copyright Year	2004
Abstract	We investigated the 3d5/2 core-level binding energy of Ru in Ru nanoislands spontaneously deposited on a Pt(111) electrode [Pt(111)/Ru], and the binding energies of 3d5/2 iodine and 1s CO adsorbed on Pt(111)/Ru by the use of X-ray photoelectron spectroscopy. Both iodine and CO were used as surface probes of the electronic properties of Pt(111)/Ru. Little difference was found in the binding energy of Ru in Pt(111)/Ru and in Ru(0001). However, the addition of Ru to Pt(111) induces major changes in the core-level binding energies of chemisorbed iodine and CO as referenced to those adsorbed on Ru(0001). We conclude that the iodine 3d5/2 and CO 1s C core levels experience higher electronic charge on Pt(111)/Ru than on Ru(0001), suggesting a charge transfer from Pt to Ru, or to a Ru-I “surface molecule” within the deposit. The charge transfer from Pt to Ru is in agreement with the result of previous in situ electrochemical NMR investigations [P.K. Babu, H.S. Kim, A. Wieckowski, E. Oldfield (2003) J. Phys. Chem. B 107:7595] and confirms the general trend of reduction in the density of states of Pt due to alloying with Ru [J. McBreen, S. Mukerjee (1995) J. Electrochem. Soc. 142:3399]. Theoretical calculations are in progress to further interpret the origin of the binding-energy shifts observed in this study.
Starting Page	794
Ending Page	803
Page Count	10
File Format	PDF
ISSN	14328488
Journal	Journal of Solid State Electrochemistry
Volume Number	8
Issue Number	10
e-ISSN	14330768
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-08-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	X-ray photoelectron spectroscopy Binding energy Platinum Ruthenium Nanoislands Iodine
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry

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