Stable Copper-Based Metal-Organic Frameworks Supported Pt-Bi Nanoparticles for Selective Oxidation of Glycerol into Dihydroxyacetone

Abstract

The selective oxidation of glycerol into high-value-added products (e.g., dihydroxyacetone, DHA) has attracted much attention. However, it is still constrained by low DHA selectivity (≤ 60%) under high glycerol conversion. Herein, we report a Pt-Bi nanoparticle catalyst supported on Cu-based metal-organic frameworks (Cu-MOF, HKUST-1). Cu-MOF as a support promotes the electron transfer from the support to Pt-Bi, and inhibits the decomposition of DHA. In situ FTIR, O2-TPD, kinetic experiments, EPR experiments, and fluorescence spectroscopy techniques show that Cu-MOF with rich microporous structure can promote oxygen adsorption and water dissociation, enhance the strong adsorption capacity of glycerol and the ability to generate abundant OH*, which is conducive to accelerating the conversion of glycerol to DHA. Consequently, Pt-Bi/Cu-MOF maintains considerable DHA selectivity (68.8%) even at a high glycerol conversion (94.2%), gaining a high yield of DHA (62.9%). Importantly, the stability of the Cu-MOF support as well as the intense metal-support interaction ensures the stability of the catalyst, which keeps superior glycerol oxidation performance after ten reaction cycles.

Supplementary files

Article information

Article type
Paper
Submitted
02 Apr 2025
Accepted
02 Jun 2025
First published
02 Jun 2025

Catal. Sci. Technol., 2025, Accepted Manuscript

Stable Copper-Based Metal-Organic Frameworks Supported Pt-Bi Nanoparticles for Selective Oxidation of Glycerol into Dihydroxyacetone

L. Lv, T. Chen, C. Guan, Y. Yu, Y. Pian, Z. Ma, J. Du, S. Zhang, H. Wei and H. Chu, Catal. Sci. Technol., 2025, Accepted Manuscript , DOI: 10.1039/D5CY00405E

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