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Herein, Ga-ZnZrOx&ZSM-5 bifunctional catalysts were designed for CO2 thermal hydrogenation to aromatics, particularly, aiming to enhance the selectivity of high-value BTX (i.e., benzene, toluene, and xylene). It was evident that the exterior surface properties and acidity of ZSM-5 can be effectively tailored by in-situ silicon deposition originating from the rice husk template. Catalytic performance assessments demonstrate an optimized catalyst achieving 88.1 % aromatics selectivity (exclusive CO) in a single pass, with a notable 45.2 % BTX selectivity within total aromatics and a low CO selectivity of 23.6 %. This superior performance is attributed to the in-situ silicon deposition on ZSM-5 during one-pot synthesis and the optimized spacing between Ga-ZnZrOx and ZSM-5 facilitated by the rice husk platform. Furthermore, in-situ DRIFTS analysis identifies key reaction intermediates. This study offers an effective strategy for tuning zeolite acidity using rice husks, while modulating metal oxide-zeolite proximity on the bio-SiO2 platform, thus boosting CO2 conversion to aromatics. © 2024 Elsevier B.V.
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Applied Catalysis B: Environmental
ISSN: 0926-3373
Year: 2024
Volume: 355
2 0 . 3 0 0
JCR@2023
Cited Count:
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4
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