Boosting Reactive Oxygen Species Formation Over Pd and VO δ Co-Modified TiO 2 for Methane Oxidation into Valuable Oxygenates

• Published in: Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-07, Vol.20 (29), p.e2311355
• Main Authors: Zhou, Huanyu, Chen, Fan, Liu, Dandan, Qin, Xin, Jing, Yangchi, Zhong, Chenyu, Shi, Rui, Liu, Yana, Zhang, Jiguang, Zhu, Yunfeng, Wang, Jun
• Format: Article
• Language: English
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.202311355

Direct photocatalytic methane oxidation into value-added products provides a promising strategy for methane utilization. However, the inefficient generation of reactive oxygen species (ROS) partly limits the activation of CH . Herein, it is reported that Pd and VO co-modified TiO enables direct and selective methane oxidation into liquid oxygenates in the presence of O and H . Due to the extra ROS production from the in situ formed H O , a highly improved yield rate of 5014 µmol g  h for liquid oxygenates with a selectivity of 89.3% is achieved over the optimized Pd V -TiO catalyst at ambient temperature, which is much better than those (2682 µmol g  h , 77.8%) without H . Detailed investigations also demonstrate the synergistic effect between Pd and VO species for enhancing the charge carrier separation and transfer, as well as improving the catalytic activity for O reduction and H O production.