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首页> 外文期刊>Physical review, E. Statistical physics, plasmas, fluids, and related interdisciplinary topics >Catalysis on microstructured surfaces: Pattern formation during CO oxidation in complex Pt domains
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Catalysis on microstructured surfaces: Pattern formation during CO oxidation in complex Pt domains

机译：在微结构表面上的催化：复杂Pt域中CO氧化过程中的图案形成

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摘要

The exploration of pattern formation by reaction-diffusion systems in complex bounded domains has begun only recently. While theoretical and numerical information points to a strong interaction between patterns and boundaries, experiments are rare and for heterogeneous catalytic reactions practically nonexistent. By constructing (using microlithography) catalytic surfaces of arbitrary shape and size, we are able to study this interaction for the catalytic oxidation of CO on Pt(110). Experiments along these lines shed light on issues such as anisotropic diffusion and the behavior of individual defects. In addition, certain geometries give rise to patterns that have not been observed on the untreated catalyst and bring to light surface mechanisms that have no analog in homogeneous reaction-diffusion systems. Simple domains of controlled size constitute paradigms that make the comparisons between theory and experiment more fruitful, as we demonstrate through modeling and simulation of such examples. This approach opens the way for systematically probing certain aspects of pattern formation unique to heterogeneous catalysis.
机译：通过反应扩散系统在复杂的有界域中形成图案的探索只是最近才开始的。尽管理论和数值信息指出了图案和边界之间的强相互作用，但很少进行实验，而且几乎不存在异相催化反应。通过构造（使用微光刻）任意形状和大小的催化表面，我们能够研究这种相互作用，以催化CO在Pt（110）上的催化氧化。沿着这些思路进行的实验揭示了各向异性扩散和单个缺陷行为等问题。另外，某些几何形状引起在未处理的催化剂上未观察到的图案，并引起在均相反应扩散系统中没有类似物的表面机理。大小受控的简单域构成了使理论与实验之间的比较更加富有成果的范式，正如我们通过对此类示例进行建模和仿真所证明的那样。这种方法为系统地探测非均相催化独有的模式形成的某些方面开辟了道路。

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