Title of article
XPS and XAS study of oxygen coadsorbed with a dispersed phase of K on graphite
Author/Authors
Puglia، نويسنده , , C. and Bennich، نويسنده , , P. and Hasselstrِm، نويسنده , , J. and Brühwiler، نويسنده , , P.A. and Nilsson، نويسنده , , A. and Li، نويسنده , , Z.Y. and Rudolf، نويسنده , , P. and Mهrtensson، نويسنده , , N.، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2001
Pages
6
From page
1
To page
6
Abstract
The adsorption of O2 onto a dispersed (low coverage) phase of K on graphite has been characterized by X-ray photoemission and X-ray absorption spectroscopy. We identify two oxygen adsorption phases before physisorbed oxygen appears. The first species dominates at low O2 exposures whereas the second one, which is probably due to oxygen adsorbed in a superoxo-like configuration (O−δ2, δ⩽1), is dominant at higher oxygen coverage. As a function of increasing oxygen dose, we confirm that the charge, initially donated by the potassium adlayer to the graphite, is gradually withdrawn from the substrate.
Keywords
Oxygen , alkali metals , X-ray photoelectron spectroscopy , X-ray absorption spectroscopy , Graphite
Journal title
Surface Science
Serial Year
2001
Journal title
Surface Science
Record number
1680485
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