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Influence of the Method of Preparation of the Pd-Bi/Al<sub>2</sub>O<sub>3</sub> Catalyst on Catalytic Properties in the Reaction of Liquid-Phase Oxidation of Glucose into Gluconic Acid
oleh: Mariya P. Sandu, Vladimir S. Sidelnikov, Andrej A. Geraskin, Aleksandr V. Chernyavskii, Irina A. Kurzina
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2020-03-01 |
Deskripsi
Gluconic acid and its derivatives are extensively used in pharmaceutical, food, textile, and pulp and paper branches of industry during production of food additives, cleansers, medicinal drugs, stabilizers, etc. To obtain gluconic acid, the method of conversion of glucose into gluconic acid by molecular oxygen in the presence of solid catalysts is promising. The process of obtaining Pd and bimetallic nanoparticles Pd-Bi, coated on Al<sub>2</sub>O<sub>3</sub>, has been considered in the work. Samples were prepared by combined and successive impregnation of the Al<sub>2</sub>O<sub>3 </sub>support using metalloorganic precursors Pd(acac)<sub>2</sub>, Bi(ac)<sub>3</sub>, and dissolved in an organic solvent (acetic acid), followed by the removal of excess solvent. To achieve the formation of Pd and bimetallic nanoparticles Pd-Bi on the substrate surface, the synthesized samples were subjected to thermal decomposition sequentially in the atmosphere of Ar, O<sub>2</sub>, and H<sub>2</sub>. The surface of the obtained catalysts was studied by a combination of physicochemical methods of analysis. The catalysts were analyzed in the reaction of liquid phase oxidation of glucose. The best results are achieved in the presence of the catalyst obtained by combined impregnation.