N2 adsorption onto the (2 × 2-O precovered Ru(0001) surface: a low-energy electron-diffraction study

✍ Scribed by H. Over; H. Bludau; R. Kose; G. Ertl

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 268 KB
• Volume: 243
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)00842-r

✦ Synopsis

The bond geometry of the mixed O + N2-(2 × 2) overlayer on Ru(0001) was determined by analyzing low-energy electron-diffraction intensity data. While the oxygen atoms sit in hcp sites, exhibiting a local adsorption geometry similar to that found in the pure 0-(2 × 2) phase, the N 2 .molecules occupy on-top sites with their interatomic axis normal to the surface. The N-N bond length is 1.12 + 0.06 A which is unchanged within the error bars if compared with the pure Ru(0001)-N2-({3 × x/3)R30 ° phase. The local reconstruction of the Ru(0001) surface in the mixed O + N 2 phase is solely induced by oxygen adsorption.