Li-promoted C_(3)N_(4) catalyst for efficient isomerization of glucose into fructose at 50℃ in water  

作　　者：Wang Liu Yanfei Zhang Mengya Sun Xinpeng Zhao Shenggang Li Xinqing Chen Liangshu Zhong Lingzhao Kong 

机构地区：[1]CAS Key Laboratory of Low-Carbon Conversion Science and Engineering,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai,201210,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]School of Physical Science and Technology,Shanghai Tech University,Shanghai,201203,China [4]School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu,215009,China

出　　处：《Green Energy & Environment》2024年第9期1419-1426,共8页绿色能源与环境（英文版）

基　　金：The financial support from the National Natural Science Foundation of China(22278419,21978316,22108289,22172188);the Ministry of Science and Technology of China(2018YFB0604700);Suzhou Key Technology Research(Social Development)Project(2023ss06)。

摘　　要：Efficient and selective glucose-to-fructose isomerization is a crucial step for production of oxygenated chemicals derived from sugars,which is usually catalyzed by base or Lewis acid heterogeneous catalyst.However,high yield and selectivity of fructose cannot be simultaneously obtained under mild conditions which hamper the scale of application compared with enzymatic catalysis.Herein,a Li-promoted C_(3)N_(4) catalyst was exploited which afforded an excellent fructose yield(40.3 wt%)and selectivity(99.5%)from glucose in water at 50℃,attributed to the formation of stable Li–N bond to strengthen the basic sites of catalysts.Furthermore,the so-formed N_(6)–Li–H_(2)O active site on Li–C_(3)N_(4) catalyst in aqueous phase changes the local electronic structure and strengthens the deprotonation process during glucose isomerization into fructose.The superior catalytic performance which is comparable to biological pathway suggests promising applications of lithium containing heterogeneous catalyst in biomass refinery.

关 键 词：GLUCOSE FRUCTOSE ISOMERIZATION Li–C_(3)N_(4) Density functional theory calculations 

分 类 号：O643.36[理学—物理化学] O629.11[理学—化学]