Rapid Ozone Decomposition over Water‐activated Monolithic MoO 3 /Graphdiyne Nanowalls under High Humidity

• Published in: Angewandte Chemie International Edition Vol. 62; no. 39
• Main Authors: Zhu, Yuhua, Yang, Leyi, Ma, Jiami, Fang, Yarong, Yang, Ji, Chen, Xiaoping, Zheng, Juan, Zhang, Shuhong, Chen, Wei, Pan, Chuanqi, Zhang, Baojian, Qiu, Xiaofeng, Luo, Zhu, Wang, Jinlong, Guo, Yanbing
• Format: Journal Article
• Language: English
• Published: 25.09.2023
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.202309158

Abstract Catalytic ozone (O 3 ) decomposition at high relative humidity (RH) remains a great challenge due to the catalysts poison and deactivation under high humidity. Here, we firstly elaborate the role of water activation and the corresponding mechanism of the promoted O 3 decomposition over the three‐dimensional monolithic molybdenum oxide/graphdiyne (MoO 3 /GDY) catalyst. The O 3 decomposition over MoO 3 /GDY reaches up to 100 % under high humid condition (75 % RH) at room temperature, which is 4.0 times as high as that of dry conditions, significantly surpasses other carbon‐based MoO 3 materials(≤7.1 %). The sp‐hybridized carbon in GDY donates electrons to MoO 3 along the C−O−Mo bond, facilitating water activation to form hydroxyl species. As a result, hydroxyl species dissociated from water act as new active sites, promoting the adsorption of O 3 and the generation of new intermediate species (hydroxyl ⋅OH and superoxo ⋅O 2 − ), which significantly lowers the energy barriers of O 3 decomposition (0.57 eV lower than dry conditions).