NH3 decomposition kinetics on supported Ru clusters: Morphology and particle size effect
文献类型：期刊论文
| 作者 | Zheng, Weiqing; Zhang, Jian; Xu, Hengyong; Li, Wenzhao |
| 刊名 | catalysis letters
 |
| 出版日期 | 2007-12-01 |
| 卷号 | 119期号:3-4页码:311-318 |
| 关键词 | ammonia decomposition Ru kenitics size effects compensation effect |
| 英文摘要 | the supported ru clusters with mean sizes ranging from 1.9 to 4.6 nm showed a high activity towards the nh3 decomposition reaction. the structural properties of catalysts were characterized by n-2 adsorption/desorption, x-ray diffraction (xrd) and transmission electron micrograph (tem). steady-state reaction kinetics revealed that the apparent activation energy increased with a decrease in ru particle size and ranged from 79 kj mol(-1) to 122 kj mol(-1). the decomposition rate over ru nanoparticles showed a strong dependency on mean crystallite size and the optimum appeared at d(ru) = 2.2 nm. the dependencies of reaction rate on partial pressures of nh3 and h-2 were also sensitive to the varying ru particle size. experimental data could be well fitted by the temkin-pyzhev equation, indicating that the recombinative desorption of surface nitrogen atom acts as the rate-determining step. a compensation effect between the pre-exponential factor (k(0)) and activation energy (e-a ) was quantified. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | cox-free hydrogen ; fuel-cell applications ; catalytic ammonia decomposition ; structure sensitivity ; ruthenium catalysts ; carbon ; generation ; compensation ; potassium ; mechanism |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000250996200018 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140683]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, Grad Sch, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Weiqing,Zhang, Jian,Xu, Hengyong,et al. NH3 decomposition kinetics on supported Ru clusters: Morphology and particle size effect[J]. catalysis letters,2007,119(3-4):311-318. |
| APA | Zheng, Weiqing,Zhang, Jian,Xu, Hengyong,&Li, Wenzhao.(2007).NH3 decomposition kinetics on supported Ru clusters: Morphology and particle size effect.catalysis letters,119(3-4),311-318. |
| MLA | Zheng, Weiqing,et al."NH3 decomposition kinetics on supported Ru clusters: Morphology and particle size effect".catalysis letters 119.3-4(2007):311-318. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。