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- W2056575643 abstract "Copper Y zeolites have been studied by ESR and ir spectroscopy. At low activation temperatures, the zeolite exhibits Brönsted acidity. Pyridine is coordinatively adsorbed on cupric ions and gives rise to an ir band at 1451 cm−1. No true Lewis acid sites are detected. However, CO-reduced samples acquire Lewis acid centers and cupric ions are reduced to cuprous ions. Hydrogen reduction results in the formation of metallic copper, and the solid acquires acidic hydroxyl groups which are more stable than those held on HY zeolites. The oxidizing properties of the cupric Y zeolite are attributed to the cupric ions while those of reduced samples are due to true Lewis acid sites." @default.
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- W2056575643 date "1971-08-01" @default.
- W2056575643 modified "2023-10-18" @default.
- W2056575643 title "Oxidizing and acidic properties of copper-exchange Y zeolite" @default.
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- W2056575643 doi "https://doi.org/10.1016/0021-9517(71)90183-7" @default.
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