期刊論文
| 學年 | 101 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2013-01-22 |
| 作品名稱 | Size-Dependent Dissociation of Carbon Monoxide on Cobalt Nanoparticles |
| 作品名稱（其他語言） | |
| 著者 | Anders Tuxen; Sophie Carenco; Mahati Chintapalli; Chuang, Cheng-Hao; Carlos Escudero; Elzbieta Pach; Peng Jiang; Ferenc Borondics; Brandon Beberwyck; A. Paul Alivisatos; Geoff Thornton; Pong, Way-Faung; Guo, Jinghua; Ruben Perez; Flemming Besenbacher; Miquel Salmeron |
| 單位 | 淡江大學物理學系 |
| 出版者 | Washington: American Chemical Society |
| 著錄名稱、卷期、頁數 | Journal of the American Chemical Society 135(6), p.2273-2278 |
| 摘要 | In situ soft X-ray absorption spectroscopy (XAS) was employed to study the adsorption and dissociation of carbon monoxide molecules on cobalt nanoparticles with sizes ranging from 4 to 15 nm. The majority of CO molecules adsorb molecularly on the surface of the nanoparticles, but some undergo dissociative adsorption, leading to oxide species on the surface of the nanoparticles. We found that the tendency of CO to undergo dissociation depends critically on the size of the Co nanoparticles. Indeed, CO molecules dissociate much more efficiently on the larger nanoparticles (15 nm) than on the smaller particles (4 nm). We further observed a strong increase in the dissociation rate of adsorbed CO upon exposure to hydrogen, clearly demonstrating that the CO dissociation on cobalt nanoparticles is assisted by hydrogen. Our results suggest that the ability of cobalt nanoparticles to dissociate hydrogen is the main parameter determining the reactivity of cobalt nanoparticles in Fischer–Tropsch synthesis. |
| 關鍵字 | |
| 語言 | en_US |
| ISSN | 0002-7863;1520-5126 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | Miquel Salmeron |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/83174 ) |