抄録
Intermediate species formed on Ag(110) surfaces under the presence of ethylene and oxygen in the sub-Torr pressure range were studied by near-ambient-pressure X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) measurements. Carbonates are clearly observed exclusively under an ethylene-rich condition (0.2 Torr ethylene and 0.04 Torr oxygen; ethylene/oxygen = 5) at a high temperature of 500 K or relatively low-temperature conditions (≤470 K) at an oxygen-rich gas ratio (ethylene/oxygen = 1/5). NEXAFS results support the formation of carbonates and indicate that the carbonates are adsorbed almost parallel to the Ag(110) surface. The carbonates coexist with surface oxides with different composition ratios depending on the ethylene/oxygen pressure ratio and surface temperature. From these results we propose that the carbonates are formed by reaction(s) between ethylene and oxygen on the Ag(110) surface.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 9032-9037 |
| ページ数 | 6 |
| ジャーナル | Journal of Physical Chemistry C |
| 巻 | 125 |
| 号 | 17 |
| DOI | |
| 出版ステータス | Published - 2021 5月 6 |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- エネルギー（全般）
- 物理化学および理論化学
- 表面、皮膜および薄膜