Electron Microscopy Investigations of Nanostructured Ce/Mn Oxides for Catalytic Wet Oxidation

被引：18

作者：

Perez-Omil, Jose A. ^{[1
]}

Delgado, Juan J. ^{[1
]}

Ouahbi, Widad ^{[1
]}

Hungria, Ana B. ^{[1
]}

Browning, Nigel ^{[2
]}

Cauqui, Miguel A. ^{[1
]}

Rodriguez-Izquierdo, Jose M. ^{[1
]}

Calvino, Jose J. ^{[1
]}

机构：

[1] Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Cadiz 11510, Spain

[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 19期

关键词：

MNOX-CEO2 MIXED OXIDES; CRYSTAL-STRUCTURE; HYDROTHERMAL PREPARATION; MANGANESE OXIDES; EDGE STRUCTURES; VALENCE STATES; O COMPOSITES; HREM IMAGES; GAMMA-MNOOH; MN;

D O I：

10.1021/jp100635e

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：

A series of Ce/Mn oxides has been characterized using a variety of complementary transmission electron microscopy techniques to obtain nanometer scale information on the structure, chemical composition, and oxidation states of the different phases present in this extremely complex system. The phases have been identified to be alpha-Mn2O3, beta-MnO2, mixed-valence manganese oxides (Mn3O4 and Mn5O8), and Ce-Mn mixed oxides in different proportions depending on the Ce/Mn atomic ratio. A correlation between the nanostructure of this composite system and its catalytic activity for the wet oxidation of phenol, as a model contaminant, is proposed.

引用

页码：8981 / 8991

页数：11

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