Journal
RSC ADVANCES
Volume 5, Issue 47, Pages 37112-37118Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra04048e
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Funding
- Program for Key Science and Technology Innovation Team of Shaanxi Province [2012KCT-21]
- Program for Changjiang Scholars and Innovative Research Team in University of China [IRT_14R33]
- Fundamental Research Funds for the Central Universities [GK201501007]
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Thermally expanded graphene oxide (TEGO) supported PtAu alloy nanoparticles with various compositions was prepared, and then characterized using a combination of atomic absorption spectroscopy, powder X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. These catalysts were evaluated for the aerobic oxidation of glycerol in base-free aqueous solution. The results showed that PtAu(7 : 1)/TEGO exhibited the optimum activity for the conversion of glycerol among all the catalysts. Glycerol conversion of 60.4% and selectivities of 53.5% glyceric acid (GLYA), 25.7% glyceraldehydes (GLYDE), 11.6% dihydroxyacetone (DHA), and 3.8% glycolic acid (GLYCA) were obtained when reacting an aqueous solution of glycerol (0.3 M, 20 mL) at 60 degrees C under 0.3 MPa O-2 for 4 h in the presence of 0.023 g PtAu(7 : 1)/TEGO catalyst. Moreover, the reusability of PtAu(7 : 1)/TEGO was investigated, and a reaction mechanism for the oxidation of glycerol was proposed.
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