Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (5): 960.doi: 10.7503/cjcu20200070

• Article • Previous Articles     Next Articles

Glucose Oxidation on Au-supported SBA-15 Molecular Sieve

YE Xiaodong1,3,QI Guodong1,XU Jun1,2,*(),DENG Feng1,*()   

  1. 1. National Centre for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Key Laboratory of Magnetic Resonance in Biological Systems, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
    2. Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-02-10 Online:2020-05-10 Published:2020-03-06
  • Contact: Jun XU,Feng DENG E-mail:xujun@wipm.ac.cn;dengf@wipm.ac.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(21872170);† Supported by the National Natural Science Foundation of China(U1932218);† Supported by the National Natural Science Foundation of China(21733013)

Abstract:

Conversion of glucose to high-valued chemicals is one of the important routes for biomass utilization. Gold and aluminum modified SBA-15 molecular sieve catalysts(Au-Al/SBA-15) were prepared for aerobic oxidation of glucose. The active site-catalytic performance relationship was investigated. The structures of Au-Al/SBA-15 catalysts with different Au and Al contents were characterized by means of solid-state nuclear magnetic resonance(NMR) in combination with other techniques. It was found that four-coordinated Al is generated on SAB-15 and Au mainly exists in form of metallic state. The supported Au can be stabilized by four-coordinated Al, resulting in smaller Au particles on SBA-15. The interaction between Au and Al species promotes glucose oxidation, while the extra-framework Al species causes the side reaction and lower selectivity to gluconic acid. The role of NaOH in the reaction was revealed by 13C solid-state NMR experiments, it benefits desorption of gluconic acid molecules from the catalyst surface, keeping the active sites uncovered and promoting the reaction.

Key words: Biomass, Glucose oxidation, Molecular sieve catalyst, Solid-state nuclear magnetic resonance(NMR), Structure-activity relationship

CLC Number: 

TrendMD: