| 查看: 373 | 回复: 4 | |||
| 当前主题已经存档。 | |||
csfn荣誉版主 (知名作家)
|
[交流]
【分享】9月25日的science：Al3+ as binding sites for Pt on Al2O3
|
||
|
abstract： In many heterogeneous catalysts, the interaction of metal particles with their oxide support can alter the electronic properties of the metal and can play a critical role in determining particle morphology and maintaining dispersion. We used a combination of ultrahigh magnetic field, solid-state magic-angle spinning nuclear magnetic resonance spectroscopy, and high-angle annular dark-field scanning transmission electron microscopy coupled with density functional theory calculations to reveal the nature of anchoring sites of a catalytically active phase of platinum on the surface of a g-Al2O3 catalyst support material. The results obtained show that coordinatively unsaturated pentacoordinate Al3+ (Al3+ penta) centers present on the (100) facets of the g-Al2O3 surface are anchoring Pt. At low loadings, the active catalytic phase is atomically dispersed on the support surface (Pt/Al3+ penta = 1), whereas two-dimensional Pt rafts form at higher coverages. title：Coordinatively Unsaturated Al3+ Centers as Binding Sites for Active Catalyst Phases of Platinum on g-Al2O3 from ：25 SEPTEMBER 2009 VOL 325 SCIENCE link：http://www.sciencemag.org/cgi/content/abstract/325/5948/1670 [ Last edited by mingdong on 2009-12-9 at 08:21 ] |
回复此楼» 猜你喜欢
反铁磁体中的磁性切换：两种不同的机制已成功可视化
已经有0人回复
-
求标准粉末衍射卡号 ICDD 01-076-1802
已经有0人回复
-
物理学I论文润色/翻译怎么收费?
已经有251人回复
-
新西兰Robinson研究所招收全奖PhD
已经有0人回复
-
石墨烯转移--二氧化硅衬底石墨烯
已经有0人回复
-
笼目材料中量子自旋液体基态的证据
已经有0人回复
-
数学教学论硕士可以读数学物理博士吗？
已经有0人回复
-
德国亥姆霍兹Hereon中心汉堡分部招镁合金腐蚀裂变SCC课题方向2026公派博士生
已经有4人回复
-
澳门大学 应用物理及材料工程研究院 潘晖教授课题组诚招博士后
已经有11人回复
 |
2楼2009-09-27 20:22:36
顶 |
3楼2009-09-28 01:03:35
fegg7502
荣誉版主 (知名作家)
无
- 计算强帖: 5
- 应助: 20 (小学生)
- 贵宾: 13.133
- 金币: 18798.3
- 散金: 2753
- 红花: 31
- 沙发: 13
- 帖子: 7483
- 在线: 590.2小时
- 虫号: 352334
- 注册: 2007-04-22
- 性别: GG
- 专业: 催化化学
- 管辖: 第一性原理
4楼2009-09-28 01:05:15
csfn
荣誉版主 (知名作家)
- 应助: 10 (幼儿园)
- 贵宾: 28.97
- 金币: 20056.9
- 散金: 7537
- 红花: 94
- 沙发: 46
- 帖子: 9522
- 在线: 1047.1小时
- 虫号: 433110
- 注册: 2007-08-18
- 性别: GG
- 专业: 催化化学
- 管辖: 量子化学
5楼2009-09-28 07:54:38