Simulation of the life cycle of adsorbate islands on the Pt(100) surface during the NO+NH3 reaction

Rafti M; Vicente JL; Uecker H; Imbihl R

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Simulation of the life cycle of adsorbate islands on the Pt(100) surface during the NO+NH3 reaction

机译：NO + NH3反应过程中Pt（100）表面吸附物岛的生命周期模拟

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Photoemission electron microscopy (PEEM) of the NO + NH3 reaction on a Pt(100) single crystal surface under UHV conditions reveals complicated dynamical behavior. As a rationalization for the observed spatio-temporal evolution of the surface a so-called 'island growth mechanism' was proposed. Here, we present the results of 1D simulations with a realistic 7-variable model that takes explicitly into account macroscopic surface defects on the catalyst. Depending on whether or not we consider site-blocking effects of coadsorbates on diffusing species, we obtain different patterns. The experimental PEEM data can be qualitatively reproduced in this way. (c) 2006 Elsevier B.V. All rights reserved.

机译：超高压条件下Pt（100）单晶表面上NO + NH3反应的光电发射电子显微镜（PEEM）显示复杂的动力学行为。为了合理化观测到的地表时空演变，提出了一种所谓的“岛生长机制”。在这里，我们用实际的7变量模型展示一维模拟的结果，该模型明确考虑了催化剂上的宏观表面缺陷。根据我们是否考虑共吸附物对扩散物质的位阻效应，我们获得不同的模式。实验PEEM数据可以以此方式定性地复制。（c）2006 Elsevier B.V.保留所有权利。

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《Chemical Physics Letters》 |2006年第6期|共7页
作者
Rafti M; Vicente JL; Uecker H; Imbihl R;
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OSCILLATORY KINETICS; FRONT PROPAGATION; DIFFUSION; REDUCTION; NO;

机译：振荡动力学;正向传播;扩散;还原;无;

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Simulation of the life cycle of adsorbate islands on the Pt(100) surface during the NO+NH3 reaction

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