Oxidation of Ethanol in Cu-Faujasites Studied by IR Spectroscopy

@article{Kuterasiski2021OxidationOE,
  title={Oxidation of Ethanol in Cu-Faujasites Studied by IR Spectroscopy},
  author={Łukasz Kuterasiński and Jerzy Podobiński and Jerzy Datka},
  journal={Molecules},
  year={2021},
  volume={26}
}
In this study, IR studies of the coadsorption of ethanol and CO on Cu+ cations evidenced the transfer of electrons from ethanol to Cu+, which caused the lowering of the frequency of the band attributed to CO bonded to the same Cu+ cation due to the more effective π back donation of d electrons of Cu to antibonding π* orbitals of CO. The reaction of ethanol with acid sites in zeolite HFAU above 370 K produced water and ethane, polymerizing to polyethylene. Ethanol adsorbed on zeolite Cu(2)HFAU… 

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References

SHOWING 1-10 OF 58 REFERENCES

Transformations of formaldehyde molecules in Cu-ZSM-5 zeolites

The activation of C=O bond in formaldehyde molecule was followed by IR spectroscopy. IR studies showed that the interaction of formaldehyde with Cu + weakens of the C=O bond and results in a red

Reduction and Oxidation of Cu Species in Cu-Faujasites Studied by IR Spectroscopy

The process of reduction and oxidation of Cu sites in dealuminated faujasite-type zeolites was studied by infrared (IR) spectroscopy with CO and NO as probe molecules to investigate the susceptibility of various forms of Cu for reduction.

IR Studies of the Cu Ions in Cu-Faujasites

The properties of Cu ions in dealuminated faujasite-type zeolites containing 1, 2, and 5 wt.% of Cu were investigated by IR spectroscopy with CO and NO as probe molecules, showing that some Cu ions were situated inside hexagonal prisms and/or cuboctahedra, and were inaccessible to adsorbed molecules.

IR Studies of the Activation of CC Bond in Alkenes by Cu+ Ions in Zeolites

IR studies show that Cu+ ions in zeolites CuX, CuY, and CuZSM-5 are able to activate CC bond in alknenes (ethene, propene, but-1-ene, and cis-but-2-ene). The stretching frequency of the CC− band

Ethanol conversion over ion-exchanged ZSM-5 zeolites

...