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Citation: Zeng Jian-Qing, Zhang Jing-Cheng, Zhong Bing. Monte Carlo Simulation of CO Oxidation Reaction on Fractal Surface[J]. Acta Physico-Chimica Sinica, ;1999, 15(06): 555-559. doi: 10.3866/PKU.WHXB19990614 shu

Monte Carlo Simulation of CO Oxidation Reaction on Fractal Surface

1.
Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650

Received Date: 13 July 1998
Available Online: 15 June 1999

The CO oxidation reaction on DLA fractal surface has been studied in detail by Monte Carlo method. It was found that (1) when only adsorption and surface reaction were considered the O atoms and CO molecules on surface would self-organize after a reation period, which greatly decreased the touching chance among different reactant molecules and consequently decreased the reaction rate. Furthermore, O atoms tended to be adsorbed at the center or the inner area of DLA surface while CO molecules could exist only at the exterior; (2) the clusters of O atoms could be cut off by vacant active sites after the introduction of CO diffusion on surface, which would further give rise to accelerateion of the reaction rate; (3) when the reversible adsorption of CO was introduced O atoms and CO molecules could adsorb evenly on the whole DLA surface and then the reaction would be speeded up greatly, which suggested that for a od catalyst the adsorbing strength should be moderate.
- Monte Carlo simulation,
- CO oxidation,
- Fractal surface
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