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    Enhanced activity and water tolerance promoted by Ce on MnO/ZSM-5 for ozone decomposition

    Year: 2021

    Journal: Chemosphere, Volume 280, OCT

    Authors: Ji, Jian; Yu, Yi; Cao, Shuo; Huang, Haibao

    Organizations: Guangdong Basic and Applied Basic Research Foundation (China) [2020A1515010865]; National Natural Science Foundation of China (NSFC) (China) [22076224]; Fundamental Research Funds for the Central Universities (China) [20lgjc03, 20lgpy95]; Open Fund of Guangdong Province Engineering Laboratory for Air Pollution Control (China) [2019323609-01]; Hunan Construction Engineering Group (China) [K20-38000-030]

    Keywords: Ozone decomposition; Manganese oxide; Ce promotion; Water-tolerant; Acidic property

    Catalytic decomposition is a promising way to eliminate ozone using manganese oxides. However, water-induced deactivation of the catalysts remains a challenge for further application. In this work, a series of Ce-promoted MnO supported on ZSM-5 (Mn-xCe/ZSM-5) were developed for ozone decomposition, which exhibited superior catalytic performance. The catalysts were characterized by multiple techniques. It is indicated that MnO was highly dispersed on ZSM-5 (Mn/ZSM-5), accounting for the high performance of ozone decomposition. Addition of Ce in Mn/ZSM-5 formed abundant redox pairs that promoted electron transfer, and thus exhibited superior ozone decomposition activity. Mn-3Ce/ZSM-5 with medium Ce loading showed the maximum activity by exposing the most active sites. Furthermore, Mn-3Ce/ZSM-5 was highly water-resistant in comparison with Mn/ZSM-5 by modulating the surface acidic property to be beneficial for the water desorption. This work provides an efficient and facile way to fabricate Ce-promoted Mn with low valence for effective and stable decomposition of ozone at room temperature.
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