Effects of external parameters and mass-transfer on the glucose oxidation process catalyzed by Pd–Bi/Al2O3

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Effects of external parameters and mass-transfer on the glucose oxidation process catalyzed by Pd–Bi/Al2O3	3 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1039/d1nj04103g

Title: Effects of external parameters and mass-transfer on the glucose oxidation process catalyzed by Pd–Bi/Al2O3
Creator: Sandu, Mariya Petrovna
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Kovtunov, Mikhail A.
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Gromov, Nikolay V.
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Kurzina, Irina A.
Date: 2021
DOI: 10.1039/d1nj04103g
Description: Catalytic properties of bimetallic 3.5% Pd – 2.4 %Bi catalyst supported on Al2O3 were studied in the glucose oxidation reaction into sodium gluconate at various pH, temperature and [Glu]:[Pd] ratio. It was found that pH 9 and temperature 60°C are the best conditions for the Pd3Bi/Al2O3 catalytic system. These reaction parameters contribute to the obtaining sodium gluconate with 56.6% yield while maintaining a selectivity of 99.9%. The calculated activation energy was 67.7 kJ/mol. The oxygen transfer rate investigation allowed us to conclude that the reaction proceeds in a kinetic mode. The catalyst showed activity and stability in three catalytic cycles (XGlu = 56.6-62.8, SSGlu> 99.9%). The decrease in catalytic activity in the fourth and fifth catalytic cycles is associated with a change in the valence-phase state of the catalyst surface established using XPS.