Recent advances in catalytic decomposition of ozone

Ozone (O-3), as a harmful air pollutant, has been of wide concern. Safe, efficient, and economical O-3 removal methods urgently need to be developed. Catalytic decomposition is the most promising method for O-3 removal, especially at room temperature or even subzero temperatures. Great efforts have been made to develop high-efficiency catalysts for O-3 decomposition that can operate at low temperatures, high space velocity and high humidity. First, this review describes the general reaction mechanism of O-3 decomposition on noble metal and transition metal oxide catalysts. Then, progress on the O-3 decomposition performance of various catalysts in the past 30 years is summarized in detail. The main focus is the O-3 decomposition performance of manganese oxides, which are divided into supported manganese oxides and non-supported manganese oxides. Methods to improve the activity, stability, and humidity resistance of manganese oxide catalysts for O-3 decomposition are also summarized. The deactivation mechanisms of manganese oxides under dry and humid conditions are discussed. The O-3 decomposition performance of monolithic catalysts is also summarized from the perspective of industrial applications. Finally, the future development directions and prospects of O-3 catalytic decomposition technology are put forward. (C) 2020 Published by Elsevier B.V. on behalf of The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.