Quantitative Structural Assessment of Heterogeneous Catalysts by Electron Tomography

被引：48

作者：

Grothausmann, Roman ^{[1
]}

Zehl, Gerald ^{[1
]}

Manke, Ingo ^{[1
]}

Fiechter, Sebastian ^{[1
]}

Bogdanoff, Peter ^{[1
]}

Dorbandt, Iris ^{[1
]}

Kupsch, Andreas ^{[2
]}

Lange, Axel ^{[2
]}

Hentschel, Manfred P. ^{[2
]}

Schumacher, Gerhard ^{[1
]}

Banhart, John ^{[1
]}

机构：

[1] HZB Helmholtz Zentrum Berlin GmbH, D-14109 Berlin, Germany

[2] BAM Fed Inst Mat Res & Testing, D-12200 Berlin, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 45期

关键词：

MODIFIED RUTHENIUM NANOPARTICLES; METHANOL TOLERANT CATALYSTS; SUPPORTED RU-SE; OXYGEN REDUCTION; DMFC CATHODES; METAL; RECONSTRUCTION; PARTICLES; SELENIUM; TEM;

D O I：

10.1021/ja2032508

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present transmission electron microscope (TEM) tomography investigations of ruthenium-based fuel cell catalyst materials as employed in direct methanol fuel cells (DMFC). The digital three-dimensional representation of the samples not only enables detailed studies on number, size, and shape but also on the local orientation of the ruthenium particles to their support and their freely accessible surface area. The shape analysis shows the ruthenium particles deviate significantly from spherical symmetry which increases their surface to volume ratio. The morphological studies help to understand the structure formation mechanisms during the fabrication as well as the high effectiveness of these catalysts in the oxygen reduction reaction at the cathode side of fuel cells.

引用

页码：18161 / 18171

页数：11

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