Role of potassium in the aerobic oxidation of aromatic alcohols over K+-promoted Mn/C catalysts

被引：50

作者：

Tang, Qinghu ^{[1
]}

Liu, Tao ^{[2
]}

Yang, Yanhui ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

[2] Natl Univ Singapore, Singapore Synchrotron Light Source, Singapore 117603, Singapore

来源：

CATALYSIS COMMUNICATIONS | 2008年 / 9卷 / 15期

关键词：

manganese; potassium; oxidation; aromatic alcohol; molecular oxygen;

D O I：

10.1016/j.catcom.2008.07.013

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：

The aerobic oxidation of aromatic alcohol on alkali metal promoted Mn/C catalysts has been investigated. A dramatic improvement of the oxidation activity can be observed when the Mn/C catalyst is modified with potassium ions. Characterizations of Raman and X-ray absorption fine structure (XAFS) evidence that potassium ions induce a large local distortion to Mn-O octahedrons in supported manganese oxides with coexistence of Mn2+ and Mn3+, which has been suggested to be a vital factor to enhance the activation Of 02 for the oxidation of benzylic alcohol. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2570 / 2573

页数：4

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