期刊
CHEMSUSCHEM
卷 6, 期 8, 页码 1545-1555出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201200914
关键词
acidity; green chemistry; heterogeneous catalysis; metal-organic frameworks; polyoxometalates
资金
- National Basic Research Program of China (973 Program) [2012CB215304]
- 100 Talents Program of the Chinese Academy of Sciences
- International Foundation for Science [F/5203-1]
- Guangdong Natural Science Foundation [S2011010002274]
Cellulose and cellobiose were selectively converted into sorbitol over water-tolerant phosphotungstic acid (PTA)/metal- organic-framework-hybrid-supported ruthenium catalysts, Ru-PTA/MIL-100(Cr), under aqueous hydrogenation conditions. The goal was to investigate the relationship between the acid/metal balance of bifunctional catalysts Ru-PTA/MIL-100(Cr) and their performance in the catalytic conversion of cellulose and cellobiose into sugar alcohols. The control of the amount and strength of acid sites in the supported PTA/MIL-100(Cr) was achieved through the effective control of encapsulated-PTA loading in MIL-100(Cr). This design and preparation method led to an appropriately balanced Ru-PTA/MIL-100(Cr) in terms of Ru dispersion and hydrogenation capacity on the one hand, and acid site density of PTA/MIL-100(Cr) (responsible for acid-catalyzed hydrolysis) on the other hand. The ratio of acid site density to the number of Ru surface atoms (n(A)/n(Ru)) of Ru-PTA/MIL-100(Cr) was used to monitor the balance between hydrogenation and hydrolysis functions; the optimum balance between the two catalytic functions, that is, 8.84
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