Au nanoparticles supported on Cr-based metal-organic framework as bimetallic catalyst for selective oxidation of cyclohexane to cyclohexanone and cyclohexanol
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论文类型：期刊论文
发表时间：2012-10-05
发表刊物：CATALYSIS COMMUNICATIONS
收录刊物：Scopus、EI、SCIE
卷号：27
页面范围：200-205
ISSN号：1566-7367
关键字：Cr-based MOF; Au nanoparticle; Cyclohexane; Selective oxidation
摘要：Two bimetallic catalysts Au/MIL-53(Cr) and Au/MIL-101(Cr) were prepared by urea deposition-precipitation. The catalytic performances of these catalysts were investigated via selective oxidation of cyclohexane to cyclohexanone and cyclohexanol by molecular oxygen in the absence of solvent and initiator. It is believed that framework Cr ions are effective catalytic sites, which accounts for that Au/MIL-53(Cr) and Au/MIL-101(Cr) exhibit superior catalytic performance. The confinement effect of MIL-101(Cr) cages to Au nanoparticles results in <2 nm Au particles, which accounts for that Au/MIL-101(Cr) presents higher selectivity than Au/MIL-53(Cr). (C) 2012 Elsevier B.V. All rights reserved.