Gold based bimetallic catalysts for liquid phase applications |
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| Authors: | Nikolaos Dimitratos and Laura Prati |
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| Affiliation: | (1) Laborat?rio de Cat?lise e Materiais (LCM), Laborat?rio Associado LSRE/LCM, Departamento de Engenharia Qu?mica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;(2) Departamento de Ci?ncia de los Materiales e Ingenier?a Metal?rgica y Qu?mica Inorg?nica, Facultad de Ciencias, Universidade de Cadiz, Campus Rio San Pedro Puerto Real, 11510 Cadiz, Spain |
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| Abstract: | The liquid phase oxidation of D-Sorbitol has been carried out in water using oxygen as the oxidant in the presence of gold based catalyst. Au/C, Pt/C and Pd/C monometallic systems were compared to bimetallic Au/Pd and Au/Pt on carbon. A strong synergistic effect was observed producing a significant increase of reaction rate. Moreover, the addition of gold to Pd or Pt catalyst produced a system more resistant to oxygen poisoning allowing it to work also under a moderate pressure. The effect of varying the molar ratio of the metals has also been studied. |
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