An investigation into bimetallic catalysts for base free oxidation of cellobiose and glucose

Yueling Cao, Yueling Cao, Sarwat Iqbal, Peter J. Miedziak, Daniel R. Jones, David J. Morgan, Xi Liu, Junwei Wang, Graham J. Hutchings

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Abstract

BACKGROUND: The selective conversion of cellulose to gluconic acid under mild conditions is challenging as it has abundant intra-and inter-molecular hydrogen bonds that protect the β-1,4-glycosidic bonds and make it intrinsically recalcitrant to depolymerize.

RESULTS: Au-Pd/TiO2and Au-Pt/TiO2catalysts prepared by sol immobilization method without pre-treatment are active and selective for the oxidation of glucose and cellobiose to gluconic acid under base-free conditions. Important preparation parameters are the pre-treatment of the catalyst and the metal ratio.

CONCLUSION: The optimized catalyst provided a good yield of gluconic acid from cellobiose and has opened up a new catalyst system for cellobiose conversion in terms of a heterogeneous catalyst.
Original languageEnglish
Pages (from-to)2246-2253
Number of pages8
JournalJournal of Chemical Technology and Biotechnology
Volume92
Issue number9
Early online date23 Mar 2017
DOIs
Publication statusPublished - 1 Sep 2017

Keywords

  • Au-Pd
  • Au-Pt
  • base-free condition
  • cellobiose
  • gluconic acid
  • glucose
  • oxidation

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