Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 5, Issue 2, Pages 1169-1180Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cy01148a
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Funding
- Major State Basic Research Development Program of China (973 Program) [2012CB215305, 2011CB201403]
- National Natural Science Foundation of China [21273264]
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A highly efficient and robust Cu/SiO2 catalyst from a pure-phase copper phyllosilicate precursor was successfully fabricated by the ammonia evaporation hydrothermal (AEH) method. The impregnation (IM) Cu/SiO2 catalyst was prepared for comparison. The structure, morphologies, thermal stability and surface chemical state of these catalysts were comprehensively characterized by ICP, BET, XRD (in situ XRD), N2O chemisorption, H-2-TPR, IR and Raman spectroscopy, TEM and XPS. Compared to the IM sample, the AEH catalyst was exceedingly highly active and stable (300 h) for glycerol hydrogenolysis to 1,2-propanediol. The unprecedented catalytic performance was attributed to the strong interaction between Cu and SiO2 species derived from copper phyllosilicate, well-dispersed Cu nanoparticles and the cooperative effect of Cu-0 and Cu+. Moreover, active Cu-0 species were identified as the primary active sites for glycerol hydrogenolysis, as corroborated by the strong correlation between 1,2-propanediol yield and Cu surface area.
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