Crystalline Mesoporous K2-xMn8O16 and ε-MnO2 by Mild Transformations of Amorphous Mesoporous Manganese Oxides and Their Enhanced Redox Properties

被引：63
作者：
Poyraz, Altug S. [1 ]
Song, Wenqiao [1 ]
Kriz, David [1 ]
Kuo, Chung-Hao [1 ]
Seraji, Mohammad S. [1 ]
Suib, Steven L. [2 ]
机构：
[1] Univ Connecticut, Dept Chem, Storrs, CT 06269 USA
[2] Univ Connecticut, Dept Chem, Inst Mat Sci, Storrs, CT 06269 USA
来源：
ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 14期
关键词：
mesoporous; OMS-2; epsilon-MnO2; manganese oxide; CO oxidation; UCT mesoporous materials; OCTAHEDRAL MOLECULAR-SIEVES; CATALYTIC-PROPERTIES; LATTICE OXYGEN; OXIDATION; MECHANISM; OMS-2; MNO2; CRYPTOMELANE; HOLLANDITE; DIOXIDE;
D O I：
10.1021/am502846e
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Synthesis of crystalline mesoporous K2-xMn8O16 (Meso-OMS-2), and epsilon-MnO2 (Meso-epsilon-MnO2) is reported. The synthesis is based on the transformation of amorphous mesoporous manganese oxide (Meso-Mn-A) under mild conditions: aqueous acidic solutions (0.5 M H+ and 0.5 M K+), at low temperatures (70 degrees C), and short times (2 h). Meso-OMS-2 and Meso-epsilon-MnO2 maintain regular mesoporosity (4.8-5.6 nm) and high surface areas (as high as 277 m(2)/g). The synthesized mesoporous manganese oxides demonstrated enhanced redox (H-2-TPR) and catalytic performances (CO oxidation) compared to nonporous analogues. The order of reducibility and enhanced catalytic performance of the samples is Commercial-Mn2O3 < nonporous-OMS-2 < Meso-Mn2O3 < Meso-OMS-2 < Meso-epsilon-MnO2 < Meso-Mn-A.
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收藏
页码：10986 / 10991
页数：6
相关论文
共 38 条
[1]  
Artamonova IV., 2013, Engineering, V2013, P714, DOI DOI 10.4236/eng.2013.59085
[2]   Adsorption and separation of water-soluble aromatic molecules by cyclodextrin-functionalized mesoporous silica [J].
Bibby, A ;
Mercier, L .
GREEN CHEMISTRY, 2003, 5 (01) :15-19
[3]  
Brezesinski T, 2010, NAT MATER, V9, P146, DOI [10.1038/NMAT2612, 10.1038/nmat2612]
[4]   Tunnel structure effect of manganese oxides in complete oxidation of formaldehyde [J].
Chen, Tan ;
Dou, Hongying ;
Li, Xiaoling ;
Tang, Xingfu ;
Li, Junhua ;
Hao, Jiming .
MICROPOROUS AND MESOPOROUS MATERIALS, 2009, 122 (1-3) :270-274
[5]   Ordered mesoporous and microporous molecular sieves functionalized with transition metal complexes as catalysts for selective organic transformations [J].
De Vos, DE ;
Dams, M ;
Sels, BF ;
Jacobs, PA .
CHEMICAL REVIEWS, 2002, 102 (10) :3615-3640
[6]   Mesoporous mixed oxide catalysts via non-hydrolytic sol-gel: A review [J].
Debecker, Damien P. ;
Hulea, Vasile ;
Mutin, P. Hubert .
APPLIED CATALYSIS A-GENERAL, 2013, 451 :192-206
[7]   Hydrothermal growth of manganese dioxide into three-dimensional hierarchical nanoarchitectures [J].
Ding, YS ;
Shen, XF ;
Gomez, S ;
Luo, H ;
Aindow, M ;
Suib, SL .
ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (04) :549-555
[8]   Three-dimensional mesoporous manganese oxides and cobalt oxides: High-efficiency catalysts for the removal of toluene and carbon monoxide [J].
Du, Yucheng ;
Meng, Qi ;
Wang, Jinshu ;
Yan, Jing ;
Fan, Haiguang ;
Liu, Yuxi ;
Dai, Hongxing .
MICROPOROUS AND MESOPOROUS MATERIALS, 2012, 162 :199-206
[9]   Microstructural Effects on Charge-Storage Properties in MnO2-Based Electrochemical Supercapacitors [J].
Ghodbane, Ouassim ;
Pascal, Jean-Louis ;
Favier, Frederic .
ACS APPLIED MATERIALS & INTERFACES, 2009, 1 (05) :1130-1139
[10]   Water Oxidation Catalysis using Amorphous Manganese Oxides, Octahedral Molecular Sieves (OMS-2), and Octahedral Layered (OL-1) Manganese Oxide Structures [J].
Iyer, Aparna ;
Del-Pilar, Joselyn ;
King'ondu, Cecil K. ;
Kissel, Edward ;
Garces, Hector F. ;
Huang, Hui ;
El-Sawy, Abdelhamid M. ;
Dutta, Prabir K. ;
Suib, Steven L. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (10) :6474-6483
1234