Issue 1, 2020

The fabrication of trifunctional polyoxometalate hybrids for the cascade conversion of glycerol to lactic acid

Abstract

Lactic acid (LA) has been produced with cascade reactions under non-noble metal and base-free conditions. In this work, amino acid-functionalized polyoxometalates (POMs) LyxH3−xPMo12O40 (abbreviated as LyxH3−xPMo, x = 1–3, Ly = C6H15O2N2, lysine) with triple active sites were fabricated, which presented a 87% LA yield at 96% glycerol conversion under mild reaction conditions attributed to the combination of basic sites, Brønsted acidic sites, suitable redox ability, and special microenvironments. The mechanism study showed that with LyxH3−xPMo, glycerol was oxidized first to glyceraldehyde (GCA) and dihydroxyacetone (DHA) by the redox sites; then, the existence of basic sites led to the dehydration of DHA and GCA to pyruvaldehyde (PRA) and finally, the Brønsted acid sites catalyzed the hydration of PRA to LA. Meanwhile, the activation energies for different POMs were calculated using Arrhenius plots to confirm the effect of Ly2H1PMo for its highest efficiency. These hybrids acted as heterogeneous catalysts with long duration and high stability.

Graphical abstract: The fabrication of trifunctional polyoxometalate hybrids for the cascade conversion of glycerol to lactic acid

Supplementary files

Article information

Article type
Paper
Submitted
12 септ. 2019
Accepted
21 ноем. 2019
First published
27 ноем. 2019

Catal. Sci. Technol., 2020,10, 207-214

The fabrication of trifunctional polyoxometalate hybrids for the cascade conversion of glycerol to lactic acid

M. Tao, N. Sun, Y. Li, S. Wang and X. Wang, Catal. Sci. Technol., 2020, 10, 207 DOI: 10.1039/C9CY01851D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements