| タイトル | The effect of H2O and pretreatment on the activity of a Pt/SnO2 catalyst |
| 本文（外部サイト） | http://hdl.handle.net/2060/19900015281 |
| 著者（英） | Schryer, David R.; Vannorman, John D.; Brown, Kenneth G.; Upchurch, Billy T.; Sidney, Barry D.; Schryer, Jacqueline |
| 著者所属（英） | NASA Langley Research Center |
| 発行日 | 1990-06-01 |
| 言語 | eng |
| 内容記述 | CO oxidation catalysts with high activity at 25 C to 100 C are important for long-life, closed-cycle operation of pulsed CO2 lasers. A reductive pretreatment with either CO or H2 has been shown to significantly enhance the activity of a commercially available platinum on tin (IV) oxide (Pt/SnO2) catalyst relative to an oxidative or inert pretreatment or no pretreatment. Pretreatment at temperatures of 175 C and above causes an initial dip in the observed CO2 yield before the steady-state yield is attained. This dip has been found to be caused by dehydration of the catalyst during pretreatment and is readily eliminated by humidifying the catalyst or the reaction gas mixture. It is hypothesized that the effect of humidification is to increase the concentration of OH groups on the catalyst surface which play a role in the reaction mechanism. |
| NASA分類 | INORGANIC AND PHYSICAL CHEMISTRY |
| レポートNO | 90N24597 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/137479 |
