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Insights into the nature of alumina-supported MnOOH and its catalytic performance in the aerobic oxidation of benzyl alcohol
被引:51
|作者:
Tang, Qinghu
[1
,2
]
Gong, Xiaonan
[2
]
Wu, Chengming
[2
]
Chen, Yuanting
[1
]
Borgna, Armando
[3
]
Yang, Yanhui
[1
]
机构:
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore
[2] Henan Normal Univ, Dept Chem, Xinxiang 453007, Peoples R China
[3] ASTAR, Inst Chem & Engn Sci, Singapore 627833, Singapore
关键词:
MnOOH;
Alumina;
Benzyl alcohol;
Molecular oxygen;
MOLECULAR-OXYGEN;
SELECTIVE OXIDATION;
SOLID CATALYSTS;
MANGANESE OXIDE;
HYDROTALCITE;
BENZALDEHYDE;
EFFICIENT;
KINETICS;
METAL;
D O I:
10.1016/j.catcom.2009.01.011
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
We report the synthesis of alumina-supported manganese catalysts by a homogeneous deposition-precipitation method and their catalytic application in the aerobic oxidation of benzyl alcohol. Benzyl alcohol conversion of 93% was achieved with benzaldehyde as the main product. This Mn-based catalyst can be recycled up to six times without losing catalytic activity. X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) indicated that MnOOH species are highly dispersed on the alumina surface at low Mn loadings (< 10 wt.%). These MnOOH species aggregated into Mn3O4 crystallites at high Mn loadings. (C) 2009 Elsevier B.V. All rights reserved.
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页码:1122 / 1126
页数:5
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