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CO2 hydrogenation to CH3OH promoted by strong CuxO-MgO interactions and non-thermal plasma under mild conditions
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DOI：10.1039/d5gc02218e.png)
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Abstract
En 中文
Herein, we report the strong interaction between CuxO and MgO and its crucial role in promoting plasma-catalytic CO2 hydrogenation to produce CH3OH. Four MgO supports and corresponding CuxO/MgO catalysts were prepared and systematically characterized and tested in plasma-catalytic CO2 hydrogenation. The results show that MgO supports with lower crystallinity and more defects favor stronger interactions with CuxO species, which result in better CO2 conversion and CH3OH selectivity in plasma-catalytic CO2 hydrogenation, achieving 9.1% CO2 conversion and 46.2% CH3OH selectivity under ambient reaction conditions (30 degrees C and 0.1 MPa). In situ FTIR spectra and catalyst characterization results demonstrate that basic sites of MgO and Oads. species activate CO2 molecules into CO3* species, which are further hydrogenated by H species to form the HCOO* and HCO* species on the MgO support. CuxO sites further promote the subsequent hydrogenation steps to move the reaction forward more easily to form the CH3O* intermediate and the CH3OH product, which could be the main reason why the strong CuxO-MgO interactions promote CH3OH production in plasma-catalytic CO2 hydrogenation.
Keywords:
METHANOL SYNTHESIS
COPPER-CATALYSTS
CONVERSION
SPECTRA
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9.2
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1.3W
Citations:
7.6W
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