Wu Linke, Liu Yuxi, Yu Xiaohui, Gao Ruyi, Jia Yiwen, Sun Qinpei, Feng Ying, Jing Lin, Hou Zhiquan, Deng Jiguang, Dai Hongxing
Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemical Engineering and Technology, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Environ Sci Technol. 2025 Jan 14;59(1):945-955. doi: 10.1021/acs.est.4c09649. Epub 2024 Dec 24.
Chlorinated and oxygenated volatile organic compounds (CVOCs and OVOCs) pose a significant threat to human health. Catalytic oxidation effectively removes these pollutants, but catalyst deactivation is a challenge. Our study focused on the hydrolysis oxidation of chlorobenzene (CB) and ethyl acetate (EA) over Ru/MO/HZSM-5 (M = W, Mo). It was found that doping MoO to the catalyst increased the structural hydroxyl amount and balanced surface acidity, thus significantly improving the catalytic stability, with Ru/MoO/HZSM-5 exhibiting a better activity for CB and EA oxidation ( = 438 and 276 °C at space velocity = 20,000 mL g h, respectively). Water vapor introduction considerably promoted hydrolysis oxidation and protected the active sites from being poisoned by cumulative chlorine. The synergistic interaction of the Mo-O(H)-Al structure in Ru/MoO/HZSM-5 with the Si-OH-Al structure promotes the activation of HO to form bridging hydroxyl groups, which provide a proton-rich environment for hydrolysis oxidation. It was also found that dissociated HO reacted with adsorbed oxygen species to form highly active *OOH, accelerating the deep oxidation of intermediates. We believe that the present study can provide a unique strategy for the effective elimination of multicomponent VOCs under complex conditions.
