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Pt/ZrO2 Prepared by Atomic Trapping: An Efficient Catalyst for the Conversion of Glycerol to Lactic Acid with Concomitant Transfer Hydrogenation of Cyclohexene

Tang, Z., Liu, P., Cao, H., Bals, S., Heeres, H. J. & Pescarmona, P. P., 1-Nov-2019, In : ACS Catalysis. 9, 11, p. 9953-9963 11 p.

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A series of heterogeneous catalysts consisting of highly dispersed Pt nanoparticles supported on nanosized ZrO2 (20 to 60 nm) was synthesized and investigated for the one-pot transfer hydrogenation between glycerol and cyclohexene to produce lactic acid and cyclohexane, without any additional H2. Different preparation methods were screened, by varying the calcination and reduction procedures with the purpose of optimizing the dispersion of Pt species (i.e., as single-atom sites or extra-fine Pt nanoparticles) on the ZrO2 support. The Pt/ZrO2 catalysts were characterized by means of transmission electron microscopy techniques (HAADF-STEM, TEM), elemental analysis (ICP-OES, EDX mapping), N2-physisorption, H2 temperature-programmed-reduction (H2-TPR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Based on this combination of techniques it was possible to correlate the temperature of the calcination and reduction treatments with the nature of the Pt species. The best catalyst consisted of subnanometer Pt clusters (
Original languageEnglish
Pages (from-to)9953-9963
Number of pages11
JournalACS Catalysis
Volume9
Issue number11
Publication statusPublished - 1-Nov-2019

    Keywords

  • Pt catalyst, cyclohexene, glycerol, lactic acid, transfer hydrogenation

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