Low-temperature CO oxidation properties and TEM/STEM observation of Au/γ-Fe2O3 catalysts

被引：40

作者：

Akita, Tomoki ^{[1
]}

Maeda, Yasushi ^{[1
]}

Kohyama, Masanori ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Ikeda, Osaka 5638577, Japan

来源：

JOURNAL OF CATALYSIS | 2015年 / 324卷

基金：

日本学术振兴会;

关键词：

Au; TEM/STEM; Interface; gamma-Fe2O3; Catalyst; CO oxidation; CARBON-MONOXIDE; AU/FE2O3; CATALYSTS; GOLD CATALYSTS; HAADF-STEM; AU; OXIDE; SIZE; NANOPARTICLES; DEPOSITION; MECHANISM;

D O I：

10.1016/j.jcat.2015.02.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Au/gamma-Fe2O3 catalysts with Au nanoparticles on gamma-Fe2O3 supports were prepared by the solid grinding and deposition-precipitation methods. The prepared catalysts exhibit high activity for low-temperature CO oxidation. Their catalytic activity is proportional to the total length of the perimeters of all the Au particles on the supports, indicating that the active site is located on the perimeter. The fine structure of the prepared catalysts was investigated by aberration-corrected TEM and STEM. A preferential orientation relationship was observed between Au and the gamma-Fe2O3 crystals. STEM observation revealed the atomic-scale structure of the Au(111)/gamma-Fe2O3(111) interface. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：127 / 132

页数：6

共 31 条

[1]

HAADF-STEM observation of Au nanoparticles on TiO2 [J].

Akita, T. ;

Tanaka, K. ;

Kohyama, M. ;

Haruta, M. .

SURFACE AND INTERFACE ANALYSIS, 2008, 40 (13) :1760-1763

[2]

TEM and HAADF-STEM study of the structure of Au nano-particles on CeO2 [J].

Akita, Tomoki ;

Tanaka, Koji ;

Kohyama, Masanori .

JOURNAL OF MATERIALS SCIENCE, 2008, 43 (11) :3917-3922

[3]

Electron Microscopy Study of Gold Nanoparticles Deposited on Transition Metal Oxides [J].

Akita, Tomoki ;

Kohyama, Masanori ;

Haruta, Masatake .

ACCOUNTS OF CHEMICAL RESEARCH, 2013, 46 (08) :1773-1782

[4]

The mechanism of low-temperature CO oxidation with Au/Fe2O3 catalysts:: a combined Mossbauer, FT-IR, and TAP reactor study [J].

Daniells, ST ;

Overweg, AR ;

Makkee, M ;

Moulijn, JA .

JOURNAL OF CATALYSIS, 2005, 230 (01) :52-65

[5]

Comparison of the activity of Au/CeO2 and Au/Fe2O3 catalysts for the CO oxidation and the water-gas shift reactions [J].

Deng, Weiling ;

Carpenter, Colin ;

Yi, Nan ;

Flytzani-Stephanopoulos, Maria .

TOPICS IN CATALYSIS, 2007, 44 (1-2) :199-208

[6]

Mechanism and Active Sites of the Oxidation of CO over Au/TiO2 [J].

Fujitani, Tadahiro ;

Nakamura, Isao .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (43) :10144-10147

[7]

Hydrogen Dissociation by Gold Clusters [J].

Fujitani, Tadahiro ;

Nakamura, Isao ;

Akita, Tomoki ;

Okumura, Mitsutaka ;

Haruta, Masatake .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2009, 48 (50) :9515-9518

[8]

Epitaxial growth of Au and Pt on Fe3O4(111) surface [J].

Gatel, C. ;

Snoeck, E. .

SURFACE SCIENCE, 2007, 601 (04) :1031-1039

[9]

LOW-TEMPERATURE OXIDATION OF CO OVER GOLD SUPPORTED ON TIO2, ALPHA-FE2O3, AND CO3O4 [J].

HARUTA, M ;

TSUBOTA, S ;

KOBAYASHI, T ;

KAGEYAMA, H ;

GENET, MJ ;

DELMON, B .

JOURNAL OF CATALYSIS, 1993, 144 (01) :175-192

[10]

NOVEL GOLD CATALYSTS FOR THE OXIDATION OF CARBON-MONOXIDE AT A TEMPERATURE FAR BELOW 0-DEGREES-C [J].

HARUTA, M ;

KOBAYASHI, T ;

SANO, H ;

YAMADA, N .

CHEMISTRY LETTERS, 1987, (02) :405-408

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