LI Yongfeng^1，3，LIANG Qiyi¹ ，LIU Zhi² ，CHENG Gao¹ ，JI Wenjin¹ ，DOU Yongshen³ ，LIU Sanmao³

1. School of Chemical Engineering and Light Industry， Guangdong University of Technology， Guangzhou 510006， China；

2. Foshan Shunde Midea Washing Appliance Manufacturing Co. ， Ltd. ， Midea Group， Foshan 528311， China；

3. Foshan Shunde Kinglei Environment & Technology Co. ， Ltd. ， Foshan 528308， China

Abstract

Significance Developing effective and scalable treatment methods to reduce emissions of gaseous pollutants， such as volatile organic compounds （VOCs） and ozone， is essential for mitigating their harmful effects on human health and the ecological environment. This study reviews the preparation of metal-based monolithic catalysts and their applications in catalytic oxidation of gaseous pollutants.

Progress Catalytic oxidation is advantageous for gaseous pollutant treatment due to its high purification efficiency， wide applicability for various raw materials， low secondary pollution， and overall economic viability. Compared with traditional granular catalysts， metal-based monolithic catalysts offer notable benefits， including high mechanical strength， low bed pressure drop， efficient heat transfer， and effective mass transfer. This paper summarizes and analyzes aspects such as types of structured metallic substrates， preparation methods for monolithic catalysts， and application of electric-assisted technologies in the purification of gaseous pollutants.

Conclusions and Prospects New methods are proposed for the in-situ growth of transition metal oxide active layers on structured metallic substrates， including electroless plating self-deposition and one-step method utilizing redox reactions between two galvanic cells. These methods improve the dispersion uniformity and the adhesion strength of active components on smooth metal surfaces while reducing catalyst production costs by incorporating low-cost metal oxides for synergistic catalysis. Additionally，introducing novel electric-assisted technologies such as direct internal heating via electrothermal effects and electric-assisted catalytic oxidation can greatly reduce energy consumption and improve the activity and stability in the catalytic oxidation of gaseous pollutants.

Keywords：volatile organic compounds； ozone； monolithic catalyst； catalytic oxidation