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Hydrogen adsorption on Pt(100), Pt(110), Pt(111) and Pt(1111) electrode surfaces studied by in situ infrared reflection absorption spectroscopy

✍ Scribed by Hirohito Ogasawara; Masatoki Ito

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 503 KB
Volume: 221
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)00247-9

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✦ Synopsis

HydrogenadsorptiononPt(lOO),Pt(ll 1 l)(6(l00)~(1ll)),Pt(llO)andPt(lll)electrodesurfaceswasstudiedbyboth voltammetry and in situ infrared reflection absorption spectroscopy. The terminal hydrogens adsorbed on Pt( 100)) Pt ( 11 1 1) and Pt( 110) electrodes were observed at 1990-2080 cm-' as bands appearing at potentials more negative than 0.25,O.l and 0 V versus SHE, respectively. However, a well-oriented pt ( 111) electrode did not give a significant absorption of the terminal hydrogens under similar conditions. The terminal hydrogen adsorption was sensitive to the surface crystallographic orientation.

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