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Large amounts of anthropogenic VOCs emissions give rise to photochemical smog and ground-level ozone. Currently, catalytic oxidation for VOCs elimination still requires energy-intensive high temperatures. Lightdriven photo-thermocatalysis oxidation of VOCs holds great promise to substantially reduce energy consumption for sustainable development in comparison with conventional thermal-based catalytic oxidation. Herein, CeO2/LaMnO3 composite, featuring the broad light wavelength absorption (800 similar to 1800 nm), can be used as a highly active photo-thermal responsive catalyst on VOCs decomposition under IR irradiation. The maximum photothermal conversion efficiency is able to reach 15.2% with a significant toluene conversion of 89% and CO2 yield of 87% under IR irradiation intensity of 280 mW/cm(2), together with excellent stability of nearly 30 h. Comparative characterizations reveal that such photo-thermal catalytic activity enhancement is predominantly attributed to the synergistic effects of ultrabroadband strong light absorption, efficient light-to-heat conversion, good low temperature reducibility and high lattice oxygen mobility, originating from an intense interaction of LaMnO3 with CeO2. Toluene oxidation reaction on CeO2/LaMnO3 catalyst proceeds via a Mars-van Krevelen mechanism as evidenced by in situ diffuse reflectance infrared Fourier transform spectroscopy.
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APPLIED CATALYSIS B-ENVIRONMENTAL
ISSN: 0926-3373
Year: 2019
Volume: 240
Page: 141-152
1 6 . 6 8 3
JCR@2019
2 0 . 3 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:184
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 18 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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