Orientation and symmetry of ethylene on Pd(110): A combined HREELS and NEXAFS study

H. Okuyama, S. Ichihara, H. Ogasawara, Hiroyuki Kato, T. Komeda, Maki Kawai, J. Yoshinobu

研究成果: Article査読

15 被引用数 (Scopus)

抄録

The orientation and symmetry of low-coverage ethylene adsorbed on Pd(110) at 150 K were studied by high-resolution electron energy-loss spectroscopy (HREELS) and near-edge x-ray absorption fine structure (NEXAFS) analysis. HREELS measurements unambiguously revealed that ethylene is π-bonded with the C-C axis preferentially aligned along the [110] row; this finding was also confirmed by NEXAFS. The molecular symmetry of this species was found to be C1 and thus, we proposed that the C-C axis is tilted against the surface. The effect of coadsorption with hydrogen was examined, and a flat-lying species with C2 symmetry was found to dominate on H-covered Pd(110). Furthermore, the coadsorbed hydrogen induced the C-C axis rotated about the surface normal, possibly reflecting the zigzag phase formation of adsorbed hydrogen atoms.

本文言語English
ページ(範囲)5948-5956
ページ数9
ジャーナルJournal of Chemical Physics
112
13
DOI
出版ステータスPublished - 2000 4 1
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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