Details

Autor(en) / Beteiligte

• Ducros, R.
• Alnot, M.
• Ehrhardt, J.J.
• Housley, M.
• Piquard, G.
• Cassuto, A.

Titel

A study of the adsorption of several oxygen-containing molecules (O 2, CO, NO, H 2O) on Re(0001) by XPS, UPS and temperature programmed desorption

Ist Teil von

• Surface science, 1980-04, Vol.94 (1), p.154-168

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

1980

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• We have studied the adsorption of oxygen, carbon monoxide, nitric oxide, and water vapour on Re(0001), using X-ray and ultra-violet photo electron spectroscopies (XPS and UPS) and temperature-programmed desorption. As on polycrystalline rhenium, adsorbed oxygen is completely dissociated, even at room temperature. Furthermore, the formation of a superficial oxide at room temperature seems probable. Carbon monoxide is almost completely molecularly adsorbed, only a very small fraction being dissociatively adsorbed in a single β- state. However, an attractive interaction still exists between the adsorbed atoms in this β- state. Nitric oxide is adsorbed in a dissociated β 2 state and a molecular β 1 state. The population is smaller than on polycrystalline rhenium, corresponding to half a monolayer. Mathematical treatment of the desorption spectra allowed us to determine the activation energy for desorption of nitrogen resulting from the decomposition of adsorbed species. These quantities were found to be similar to those measured for polycrystalline rhenium.