| 查看: 3383 | 回复: 9 | ||
| 当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖 | ||
dreamlyz金虫 (初入文坛)
|
[求助]
【紧急求助】关于TOF的计算
|
|
|
各位高手,小弟最近在分析反应数据计算TOF时有些迷惑,查了不同的文献, 计算方法有些差异,不知道是我的理解错误还是什么问题,真诚求教各位! 1、有的TOF为:单位时间单位质量的金属催化剂转换的分子数除以金属表面原子数 The TOF was calculated from TOF=rAc/nOF. Therewith, rAc is the total amount of acrolein converted per weight of gold per second, and nOF the amount of gold at the surface. The latter is calculated from nOF=ntotal*D, where ntotal is the total amount of gold and D the degree of dispersion (i.e., the surface-to-volume ratio), estimated by TEM. http://www.sciencedirect.com/sci ... i/S002195170200043X TOF was calculated from TOF=rAC/n*D: γ is the total moles of CO converted per gram of Pd per second; n is the total moles of Pd at the surface; D is the cluster dispersion assuming sphere clusters. D was obtained from Ref. [18] based on calculated total number of atoms in each cluster. The size of clusters was measured from TEM and we assumed spherical shape to calculate total number atoms in each cluster from diameter of the spheres. http://www.springerlink.com/content/p6gn02v77814m268/ 2、有的计算为:单位时间内转化的反应物分子数除以金属表面原子数 The turnover frequency (TOF), number of molecules of CO converted per surface atom of gold particles and per second, was calculated for the two series of catalysts with the assumption that gold particles were cubo-octahedra. This hypothesis is supported by HRTEM observation (see next section). The dispersion D was calculated by the formula D=Ns/Nt, where Ns represents the number of surface atoms and Nt the total number atoms in the particle. http://www.sciencedirect.com/sci ... i/S0021951703004482 应该以哪种方法为准呢? 比较着急,希望大家多多指教啊~~ ![]() [ Last edited by dreamlyz on 2011-6-28 at 16:10 ] |
» 猜你喜欢
湖南大学招收锂离子电池、离子液体、高分子与凝胶材料、电催化方向博士生多名
已经有5人回复
关于五水硝酸铋还原得到单质铋的问题
已经有1人回复
专业论文润色/翻译怎么收费?
已经有84人回复
山东省青年基金什么时候拨款
已经有34人回复
T/FSI 177-2024 氟化工企业安全生产规范
已经有0人回复
CES投稿
已经有2人回复
如何掌握一门外语?
已经有0人回复
企业为什么一定要做“专精特新”认定?如何成为专精特新企业?
已经有5人回复
求助ASIQwin新版本的软件
已经有0人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐,对您同样有帮助:
关于TOF计算的几点疑问。
已经有7人回复
关于TOF值得计算
已经有9人回复
TOF计算
已经有7人回复
【求助】酶催化中TON(turnover number),TOF(turnover frequency)的计算方法
已经有6人回复
【求助】负载型催化剂TOF怎么计算
已经有33人回复
【求助】如何较准确的计算TOF?
已经有9人回复
【求助】金属催化剂,TOF具体怎么算。
已经有21人回复
dreamlyz
金虫 (初入文坛)
- 应助: 0 (幼儿园)
- 金币: 1080.9
- 散金: 5
- 红花: 1
- 帖子: 42
- 在线: 45.9小时
- 虫号: 736781
- 注册: 2009-03-31
- 专业: 化工/材料/化学
6楼2011-06-28 19:28:28
sjzsh2009
铁杆木虫 (著名写手)
- 应助: 17 (小学生)
- 金币: 4409.5
- 散金: 1340
- 红花: 15
- 沙发: 1
- 帖子: 1117
- 在线: 517.1小时
- 虫号: 250669
- 注册: 2006-05-13
- 性别: GG
- 专业: 催化化学
2楼2011-06-28 17:11:55

3楼2011-06-28 19:10:42
![]() |
5楼2011-06-28 19:27:49














回复此楼