✦ LIBER ✦
A combined XPS-UPS-EELS study of nitrogen adsorbed on clean and barium-promoted iron surfaces: The nature of the precursor to dissociation
✍ Scribed by C.N.R. Rao; G.Ranga Rao; K. Ppabhakaran
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 287 KB
- Volume
- 134
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
For Nz on a clean Fe surface, the adsorbed precursor in a parallel orientation becomes predominant around 110 K, while at lower temperatures it coexists with a weakly adsorbed species. On a Ba-promoted Fe surface, however, N2 is present exclusively in the precursor state in the temperature range 80-l 50 K following moderate exposure. Besides exhibiting a low N-N stretching frequency of 1530 cm-', the precursor shows a clear separation between the 50 and lx levels in the UPS; the precursor dissociates to give a nitridic species around 160 K.
* Contribution No. 389 from the Solid State and Structural
Chemistry Unit.