Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept,Chemical Engineering & Technology

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Active Sites in Heterogeneous Photocatalysis: Brief Notes on the Identification of their Analogies with the Standard Heterogeneous Catalysis Concept
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-08-25 , DOI: 10.1002/ceat.202100249
Pavel Krystynik _{1,

2} , Petr Kluson _{2,

3} , Michal Vesely ₄ , Petr Dzik ₄ , Josef Krysa ₅

Affiliation

The reaction rate concepts in heterogeneous catalysis are based on well-defined and usually well-quantified active sites. Such an active site is stable over time and its main features are typically constant. In heterogeneous photocatalysis, the active site is of different nature. Its existence depends on the instantaneous availability of photons and the variable ability of the photocatalyst to use them. In fact, a realistic expression of the active site that at least in the main feature – stability over time – resembles the classical heterogeneous catalytic concept is missing. Here, the concept of a dynamic active site of the heterogeneous oxidation photocatalyst that is (in a dynamic sense) time stable is elaborated and carefully discussed. The novelty of this approach should be seen in the straightforward applicability of standard kinetic models.

中文翻译：

多相光催化中的活性位点：简要说明它们与标准多相催化概念的类比

多相催化中的反应速率概念基于明确定义且通常充分量化的活性位点。这种活性位点随着时间的推移是稳定的，其主要特征通常是恒定的。在多相光催化中，活性位点具有不同的性质。它的存在取决于光子的瞬时可用性和光催化剂使用它们的可变能力。事实上，至少在主要特征——随时间的稳定性——类似于经典的多相催化概念的活性位点的现实表达缺失了。在这里，阐述并仔细讨论了（在动态意义上）时间稳定的多相氧化光催化剂的动态活性位点的概念。这种方法的新颖性应该从标准动力学模型的直接适用性中看出。

更新日期：2021-10-20

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