Model Approach in Heterogeneous Catalysis: Kinetics and Thermodynamics of Surface Reactions,Accounts of Chemical Research

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Model Approach in Heterogeneous Catalysis: Kinetics and Thermodynamics of Surface Reactions
Accounts of Chemical Research ( IF 16.4 ) Pub Date : 2015-09-14 00:00:00 , DOI: 10.1021/acs.accounts.5b00237
Swetlana Schauermann _{1,

2} , Hans-Joachim Freund ₁

Affiliation

Heterogeneous catalysts are widely employed in technological applications, such as chemical manufacturing, energy harvesting, conversion and storage, and environmental technology. Often they consist of disperse metal nanoparticles anchored onto a morphologically complex oxide support. The compositional and structural complexity of such nanosized systems offers many degrees of freedom for tuning their catalytic performance. However, a rational design of heterogeneous catalysts based on an atomistic-level understanding of underlying surface processes has not been fully achieved so far and remains one of the primary goals for catalysis research. In our group, we developed concepts for replacing highly complex real supported catalysts by simplified model systems, which complexity can be gradually increased in order to mimic certain structural aspects of practically relevant catalysts in a controlled way. Well-defined model systems consisting of metal-nanoparticle ensembles supported on planar oxide substrates have proven to provide a successful approach to achieve fundamental insights into heterogeneous catalysis.

中文翻译：

非均相催化的模型方法：表面反应的动力学和热力学

非均相催化剂广泛用于技术应用中，例如化学制造，能量收集，转化和存储以及环境技术。它们通常由固定在形态复杂的氧化物载体上的分散金属纳米颗粒组成。这种纳米级系统的组成和结构复杂性为调节其催化性能提供了许多自由度。然而，到目前为止，尚未完全实现基于对底层表面过程的原子级理解的多相催化剂的合理设计，并且仍然是催化研究的主要目标之一。在我们的小组中，我们开发了用简化的模型系统代替高度复杂的实际负载型催化剂的概念，可以逐渐增加其复杂度，以便以可控的方式模拟实际相关催化剂的某些结构方面。事实证明，定义良好的模型系统由支撑在平面氧化物基质上的金属纳米粒子集合组成，可提供一种成功的方法来实现对异相催化的基本认识。

更新日期：2015-09-14

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