期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 388, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.121800
关键词
Mn-based noble-metal catalyst; Photothermal catalytic activity; VOCs oxidation; Light-induced activation; Lattice oxygen
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23030300, XDA23010303]
- National Nature Science Foundation of China [21976172]
- Science and Technology Planning Project of Fujian Province [2019Y0074]
- FJIRSM&IUE Joint Research Fund [RHZX-2018-002]
- Natural Science Foundation of Fujian Province [2017J01037]
- Cooperation of Industry-University-Institute and Scientific and Technological Cooperation of Xiamen [3502Z20182006]
- Key Research Program of Frontier Sciences from Chinese Academy of Sciences [QYZDB-SSW-DQC022]
Light-driven photothermocatalysis can provide enough energy to reach light-off temperature of VOCs on the surface of catalyst without auxiliary heat source. Herein, we synthesized noble-metal supported manganese oxide catalysts (xPt/MO) and studied their photothermal catalytic behavior of toluene degradation, where 1 Pt/MO (1 wt.% loading of Pt) and 2 Pt/MO (2 wt.% loading of Pt) exhibited more than 90 % of conversion and 70 % of mineralization under illumination of 200 mW/cm(2) light intensity with a value of 30,000 mL/(g.h) for weight hourly space velocity (WHSV), respectively. Comparison to pure MO, 1 Pt/MO owns a good photothermal catalytic stability for at least 60 h without obvious deactivation. The introduction of Pt promotes the crystallization of MO (verified by XRD and TEM analysis) and enhances the mobility of surface/sub-surface lattice oxygen (verified by O-2-TPD, H-2-TPR and CO consumption). It is proved that illumination not only supplies thermal energy to trigger the reaction of toluene oxidation but also further evoke more lattice oxygen on Pt/MO to participate in toluene decomposition.
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