| 翟润生,山田太郎.绝对脱附速度和表面饱和覆盖度的关系：CO／Rh[J].分子催化,1994,(3):197-202 |
| 绝对脱附速度和表面饱和覆盖度的关系：CO／Rh |
| Relation between the Absolute Desorption Rate and the Surface Saturation Coverage for Co/Rh |
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| DOI： |
| 中文关键词: 绝对脱附速度 饱和覆盖度 吸附平衡 |
| 英文关键词:Absolute desorption rate, Saturated coverage, Chemical adsorption equilibrium, |
| 基金项目:国家自然科学基金 |
| 翟润生 山田太郎 |
| 中国科学院大连化学物理研究所催化基础国家重点实验室，日本东京大学物性研究所，日本东京理科大学 |
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| 中文摘要: |
| 利用同位素跳跃技术，对ＣＯ／Ｒｈ体系详细研究了不同温度下，气相压强使表面达饱和吸附时的绝对脱附速度与表面覆盖度的关系以及表面饱和覆盖度与表面温度的关系。首次找到了此条件下表面饱和覆盖度与表面温度的函数关系。发现了绝对脱附速度随饱和覆盖度的降低而增加的经验规律。由于在此条件下，绝对脱附速度等于绝对吸附速度，从而推导出绝对脱附速度与表面饱和覆盖度的关系。文献中未曾报导过把脱附动力学与化学吸附平衡相关联的实验结果。获得的经验规律对探讨吸附过程中的吸脱附以及交换机理提供了强有力的实验依据。 |
| 英文摘要: |
| Adsorption isotherms and the absolute desorption rate of carbon monoxide on rhodium polycrystalline surfaces were measured by the so-called "isotope jump" method first used by Tamaru et al.Measurements were made, in paticular, on the saturated surfaces with an equilibrium between the gas phase and the surface,The relation between the surface saturation coverages and surface temperatures are found first. The absolute desorption rate at the saturated surface is a decreasing function of the surface saturation coverage. The relation of the absolute desorption rate as the function of the surface saturation coverage is derived on the basis that the absolute desorption rate is equal to the absolute adsorption rate at the saturated surface. No experimental result has been reported in the literature on the relation between desorption kinetics and adsorption equilibrium. |
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