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https://irlib.pccu.edu.tw/handle/987654321/21092
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| 題名: | Density Functional Studies of the Adsorption and Dissociation of CO(2) Molecule on Fe(111) Surface |
| 作者: | Chen, HL (Chen, Hui-Lung)
Chen, HT (Chen, Hsin-Tsung)
Ho, JJ (Ho, Jia-Jen) |
| 貢獻者: | 化學系 |
| 關鍵詞: | METHYL RADICAL RECOMBINATION
GENERALIZED GRADIENT APPROXIMATION
TOTAL-ENERGY CALCULATIONS
RATE-CONSTANT
BASIS-SET
AMMONIA-SYNTHESIS`
AB-INITIO
LOOSENESS
TRANSITION-STATE-THEORY
AUGMENTED-WAVE METHOD |
| 日期: | 2010-01 |
| 上傳時間: | 2011-12-15 13:31:42 (UTC+8) |
| 摘要: | Spin-polarized density functional theory calculation was carried out to characterize file adsorption and dissociation of CO(2) molecule on the Fe(111) surface. It was shown that the barriers for the stepwise CO(2) dissociation reaction, CO(2(g)) -> C((a)) + 2O((a)), are 21.73 kcal/mol (for OC-O bond activation) and 23.87 kcal/mol (for C-O bond activation), and the entire process is 35.73 kcal/mol exothermic. The rate constants for the dissociative adsorption of CO, have been predicted with variational RRKM theory, and the predicted rate constants, k(CO2) (in units of cm(3) molecule(-1) s(-1)), can be represented by the equations 2.12 x 10(-8)T(-0.842) exp(-0.258kcal mo1(-1)/RT)at T = 100-1000 K. To gain insights into high catalytic activity of the Fe(111) surface, the interaction nature between adsorbate and substrate is also analyzed by the detailed electronic analysis. |
| 顯示於類別: | [化學系所] 期刊論文
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