The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components,ChemistrySelect

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The Adsorption of Ozone on the Solid Catalyst Surface and the Catalytic Reaction Mechanism for Organic Components
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-12-14 , DOI: 10.1002/slct.202003805
Xuan Luo ₁ , Tongming Su ₁ , Xinling Xie ₁ , Zuzeng Qin ₁ , Hongbing Ji _{1,

2}

Affiliation

Ozone is a strong gas oxidant and is often considered as an important source of atomic oxygen. It can not only sterilize but also decompose most organic components in water. In organic reactions, it can be used for carbon‐carbon double bond oxidation. Because ozone is unstable and easy to decompose, the oxidations usually need to be carried out in the presence of low temperature or catalysts to improve the ozone utilization. The adsorption mechanisms of ozone on the surface of solid catalysts are different due to the characteristics of the ozone molecule and the different reaction conditions. In this paper, the adsorption and reaction mechanisms of ozone on solid catalyst surface are reviewed: Firstly, the ozone has weak alkalinity similar to that of CO, but the distribution of electrons in the ozone molecule exists the difference. The difference in electron distribution makes ozone to be a dipole. The central oxygen atom can accept electrons as the Lewis acid, while the terminal oxygens are electron donors to be the Lewis base. Secondly, the functional groups, which have Lewis acid and base sites, such as hydroxyl groups, can be adsorbed with the central or terminal oxygen of ozone to form a surface complex. Last, the solvents also have a critical effect on the adsorption of ozone and subsequent oxidation. According to the above mechanisms, the design and preparation of ozonation catalysts are also proposed to improve the ozonation selectivity.

中文翻译：

臭氧在固体催化剂表面的吸附及有机组分的催化反应机理

臭氧是一种强气体氧化剂，通常被认为是原子氧的重要来源。它不仅可以消毒，而且可以分解水中的大多数有机成分。在有机反应中，它可用于碳-碳双键氧化。因为臭氧不稳定且易于分解，所以氧化通常需要在低温或催化剂存在下进行以提高臭氧利用率。由于臭氧分子的特性和不同的反应条件，臭氧在固体催化剂表面的吸附机理是不同的。本文综述了臭氧在固体催化剂表面的吸附和反应机理：首先，臭氧的弱碱度与一氧化碳相似，但电子在臭氧分子中的分布存在差异。电子分布的差异使臭氧成为偶极子。中心氧原子可以接受电子作为路易斯酸，而末端氧是电子供体，成为路易斯碱。其次，具有路易斯酸和碱位（例如羟基）的官能团可以被臭氧的中心或末端氧吸附以形成表面络合物。最后，溶剂对臭氧的吸收和随后的氧化也具有关键作用。根据上述机理，还提出了臭氧化催化剂的设计和制备，以提高臭氧化的选择性。具有路易斯酸和碱位（例如羟基）的二价铁可以被臭氧的中心或末端氧吸附形成表面配合物。最后，溶剂对臭氧的吸收和随后的氧化也具有关键作用。根据上述机理，还提出了臭氧化催化剂的设计和制备，以提高臭氧化的选择性。具有路易斯酸和碱位（例如羟基）的二价铁可以被臭氧的中心或末端氧吸附形成表面配合物。最后，溶剂对臭氧的吸收和随后的氧化也具有关键作用。根据上述机理，还提出了臭氧化催化剂的设计和制备，以提高臭氧化的选择性。

更新日期：2020-12-21

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