Research Abstract


Activation and splitting of carbon dioxide on the surface of an inorganic electride material

2013年8月29日 Nature Communications 4 : 2378 doi: 10.1038/ncomms3378


戸田 喜丈1, 平山 博之2, Navaratnarajah Kuganathan3, Antonio Torrisi3, Peter V. Sushko3 & 細野 秀雄1, 4

  1. 東京工業大学 フロンティア研究機構
  2. 東京工業大学大学院 総合理工学研究科 材料物理科学専攻
  3. ロンドン大学ユニバーシティカレッジ(英国)
  4. 東京工業大学 元素戦略研究センター
Activation of carbon dioxide is the most important step in its conversion into valuable chemicals. Surfaces of stable oxide with a low work function may be promising for this purpose. Here we report that the surfaces of the inorganic electride [Ca24Al28O64]4+(e)4 activate and split carbon dioxide at room temperature. This behaviour is attributed to a high concentration of localized electrons in the near-surface region and a corrugation of the surface that can trap oxygen atoms and strained carbon monoxide and carbon dioxide molecules. The [Ca24Al28O64]4+(e)4 surface exposed to carbon dioxide is studied using temperature-programmed desorption, and spectroscopic methods. The results of these measurements, corroborated with ab initio simulations, show that both carbon monoxide and carbon dioxide adsorb on the [Ca24Al28O64]4+(e)4 surface at RT and above and adopt unusual configurations that result in desorption of molecular carbon monoxide and atomic oxygen upon heating.