Electrochemical synthesis of α-MnO2 octahedral molecular sieve

被引：23

作者：

Liao, MY

Lin, JM

Wang, JH

Yang, CT

Chou, TL

Mok, BH

Chong, NS

Tang, HY ^{[1
]}

机构：

[1] Natl Chi Nan Univ, Dept Appl Chem, Puli 545, Nantou, Taiwan

[2] Natl Tsing Hua Univ, Ctr Mat Sci, Hsinchu 300, Taiwan

[3] Middle Tennessee State Univ, Dept Chem, Murfreesboro, TN 37132 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2003年 / 5卷 / 04期

关键词：

hollandite; molecular sieve; manganese oxide; self-assembly; electrochemical synthesis;

D O I：

10.1016/S1388-2481(03)00054-7

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The alpha-MnO2, octahedral molecular sieve (OMS) with 2 x 2 hollandite-type structure can be electrochemically synthesized with a subsequent self-assembly process at 80degreesC. Powdery OMS material is prepared by the electrochemical oxidation of Mn2+ ion in an acidic medium followed by a hydrolysis reaction. Counter ion effects of H+, Li+, Na+, K+, Cs+ and Mg+2 are studied for the formation of alpha-MnO2 in this self-assembled system. Powder X-ray diffraction (XRD) is used to characterize the relationships among counter ions, electrolysis potential, and phase formation during synthesis. Li-7 nuclear magnetic resonance is used to probe the lithium environment in the hollandite-type structure of the Li+-exchanged and lithiated manganese oxides. (C) 2003 Elsevier Science B.V. All rights reserved.

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页码：312 / 316

页数：5

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