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Au/CuMgAl-hydrotalcite catalysts promoted by Cu+ and basic sites for selective oxidation of glycerol to dihydroxyacetone

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Abstract

CuMgAl-hydrotalcite-supported Au catalysts were prepared and tested in the selective conversion of glycerol to dihydroxyacetone. The electron density of Au was decreased by Cu embedded in the supports, arising from the electron transfer from Au to Cu sites. The valence state (+ 1) of Cu ions was detected. Both Cu+ and basic sites (Mg–O) affected the catalytic activity of Au catalysts. The Cu+ sites promoted the selective oxidation of glycerol to dihydroxyacetone, while basic sites boosted the selectivity oxidation of glycerol to glyceric acid. The synergy of Cu+ sites and basic sites could effectively promote the activity and selectivity of Au catalysts in the selectively conversion of glycerol to dihydroxyacetone. A 53% conversion of glycerol and 72% of dihydroxyacetone selectivity were obtained under optimum reaction conditions.

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Funding

This work was supported by projects funded by the Major Research Plan of National Natural Science Foundation of China (Program No. 91545130).

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Authors and Affiliations

  1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Normal University, Xi’an, 710119, People’s Republic of China

    Yanrui Yin, Tian Tang & Chunli Xu

  2. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, People’s Republic of China

    Yanrui Yin, Tian Tang & Chunli Xu

Authors
  1. Yanrui Yin
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  2. Tian Tang
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  3. Chunli Xu
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Correspondence to Chunli Xu.

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Yin, Y., Tang, T. & Xu, C. Au/CuMgAl-hydrotalcite catalysts promoted by Cu+ and basic sites for selective oxidation of glycerol to dihydroxyacetone. Gold Bull 50, 319–326 (2017). https://doi.org/10.1007/s13404-017-0222-z

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  • DOI: https://doi.org/10.1007/s13404-017-0222-z

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