4.2 Article

Methanobactin-mediated synthesis of bimetallic Au-Pd/Al2O3 toward an efficient catalyst for glucose oxidation

Journal

IET NANOBIOTECHNOLOGY
Volume 11, Issue 5, Pages 512-516

Publisher

WILEY
DOI: 10.1049/iet-nbt.2016.0168

Keywords

sugar; oxidation; biochemistry; gold; lead; aluminium compounds; catalysts; X-ray diffraction; ultraviolet spectra; X-ray photoelectron spectra; transmission electron microscopy; visible spectra; catalysis; biological techniques; bimetallic Au-Pd-Al2O3 methanobactin-mediated synthesis; glucose oxidation; green bioreductive approach; bimetallic Au-Pd-Al2O3 catalysts; glucose solvent-free oxidation; gluconic acid; Au-to-Pd molar ratio; catalytic reaction; X-ray diffraction; X-ray photoelectron spectroscopy; transmission electron microscopy; diffuse reflectance UV-vis spectroscopy; temperature 323 K; Au-Pd-Al2O3

Funding

  1. National Natural Science Foundation of China [21073050, 21573055]
  2. State Key Laboratory for Oxo Synthesis and Selective Oxidation
  3. State Key Laboratory of Chemical Resource Engineering

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A green bioreductive approach with methanobactin was adopted to fabricate bimetallic Au-Pd/Al2O3 catalysts for solvent-free oxidation of glucose to gluconic acid with H2O2 at atmospheric pressure. The catalyst was characterised by diffuse reflectance UV-vis spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction techniques to understand synergistic interactions between Au and Pd. Effects of Au to Pd molar ratio on the catalytic activity of Au-Pd/Al2O3 were investigated. The Au-Pd/Al2O3 catalyst with Au/Pd molar ratio of 0.8:0.2 exhibited excellent catalytic performance. With the catalyst, the oxidation activities of glucose to gluconic acid 2856mmolmin(-1) g(-1) and selectivity 99.6% were attained at 323K with H2O2. The results indicated the activity and selectivity was affected by the ratio of Au/Pd on the Al2O3. The formation of Au0.8Pd0.2/Al2O3 was favourable for the catalytic reaction.

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