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Issue 22, 2018
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Au@h-Al2O3 analogic yolk–shell nanocatalyst for highly selective synthesis of biomass-derived d-xylonic acid via regulation of structure effects

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Abstract

Selective oxidation of biomass-based monosaccharides into value-added sugar acids is highly desired, but limited success of producing D-xylonic acid has been achieved. Herein, we report an efficient catalyst system, viz., Au nanoparticles anchored on the inner walls of hollow Al2O3 nanospheres (Au@h-Al2O3), which could catalyze the selective oxidation of D-xylose into D-xylonic acid under base-free conditions. The mesoporous Al2O3 shell as the adsorbent first adsorbed D-xylose. Then, the interface of Au nanoparticles and Al2O3 as active sites spontaneously dissociated O2, and the exposed Au nanoparticle surface as the catalytic site drove the transformation. With this catalyst system, the valuable D-xylonic acid was produced with excellent yields in the aerobic oxidation of D-xylose. Extensive investigation showed that Au@h-Al2O3 is an efficient catalyst with high stability and recyclability.

Graphical abstract: Au@h-Al2O3 analogic yolk–shell nanocatalyst for highly selective synthesis of biomass-derived d-xylonic acid via regulation of structure effects

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Supplementary files

Article information


Submitted
17 Aug 2018
Accepted
26 Sep 2018
First published
03 Oct 2018

Green Chem., 2018,20, 5188-5195
Article type
Paper

Au@h-Al2O3 analogic yolk–shell nanocatalyst for highly selective synthesis of biomass-derived D-xylonic acid via regulation of structure effects

J. Ma, Z. Liu, J. Song, L. Zhong, D. Xiao, H. Xi, X. Li, R. Sun and X. Peng, Green Chem., 2018, 20, 5188
DOI: 10.1039/C8GC02618A

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