On the adsorption of ionic phosphate species on Au(111)—an in situ FTIR study

✍ Scribed by M. Weber; F.C. Nart

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 736 KB
• Volume: 41
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(95)00353-3

✦ Synopsis

The adsorption of phosphate species on the well ordered Au( 111) single crystal surfaces was studied with in situ FTIR spectroscopy in order to identify the spectral features of the adsorbed H,PO;, HPOf-and PO:-selectively by changing the OH-content in solution.

H,PO; presents two Potential dependent adsorbate features at 1100 and 98Ocm-' due to the two symmetric stretching vibrations of the adsorbed ion under CIV symmetry. HPO:-shows only one potential dependent band at about 112Ocm-' which can be attributed to the symmetric A, stretching of the adsorbate, probably under Cs, symmetry. For the adsorbed PO:-one Potential dependent feature located between ca. 1060 and 1083cm-' was found. This band is assigned to the A, mode due to the splitting of the vibration of the F mode undet C,, or C,, symmetry.