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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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Publication details

The article was received on 17 Aug 2018, accepted on 26 Sep 2018 and first published on 03 Oct 2018


Article type: Paper
DOI: 10.1039/C8GC02618A
Citation: Green Chem., 2018,20, 5188-5195
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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

    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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