2012年4月
Direct observation of the initial process of Ostwald ripening using spherical aberration-corrected transmission electron microscopy
JOURNAL OF ELECTRON MICROSCOPY
- ,
- ,
- 巻
- 61
- 号
- 2
- 開始ページ
- 99
- 終了ページ
- 103
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1093/jmicro/dfr100
- 出版者・発行元
- OXFORD UNIV PRESS
We study in situ behavior of platinum single atoms on amorphous carbon (a-carbon) using a spherical aberration-corrected transmission electron microscope (AC-TEM). Diffusion of single atoms, bi-atoms, clusters (< 1 nm) and nanoparticles (< 3 nm) was recorded in the same image with a time resolution of 1 s, and such diffusion matches the expected mechanism of Ostwald ripening, which was seen on these samples. In situ AC-TEM shows promise for dynamical observation of single atom diffusion, which is important for understanding nanosized catalysts and ceramic sintering processes. We apply in situ AC-TEM to image platinum (Pt) nanoparticles on a-carbon, which is a model catalyst system for the real Pt electrode catalysts using alloys and core-shell structures supported on carbon/oxide composite materials in the proton exchange membrane fuel cell.
- リンク情報
- ID情報
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- DOI : 10.1093/jmicro/dfr100
- ISSN : 0022-0744
- Web of Science ID : WOS:000302493100004