Affordable Access

Development of a specimen heating holder with an evaporator and gas injector and its application for catalyst.

Authors
  • Takeo, Kamino
  • Toshie, Yaguchi
  • Mitsuru, Konno
  • Akira, Watabe
  • Yasuhira, Nagakubo
Type
Published Article
Journal
Journal of electron microscopy
Publication Date
Oct 01, 2006
Volume
55
Issue
5
Pages
245–252
Identifiers
PMID: 17135215
Source
Medline
License
Unknown

Abstract

A specimen heating holder equipped with a gas injector and an evaporator has been developed for use with conventional transmission electron microscopes (TEMs). The developed specimen holder allows both synthesis of metal oxide support and deposition of catalyst nano-particles in situ. Since the holder is designed to be used in small gapped high-resolution objective lens pole-piece, all the procedure from the synthesis of support material to the deposition of catalyst as well as the behavior of the catalyst nano-particles on the support can be observed at near atomic resolution. The developed specimen holder was applied to the study of AuPd catalyst. First, air was injected onto heated aluminum particles via a gas injector to synthesize Al(2)O(3) support. Then, nano-particles of AuPd were deposited on the Al(2)O(3) support. After the deposition, the synthesized Al(2)O(3) support was heated and air was injected again to observe behaviors of the deposited AuPd nano-particles at elevated temperatures in the aerial environment. Behaviors of the AuPd nano-particles such as coalescence, segmentation and diffusion to the Al(2)O(3) support were dynamically observed at atomic level high resolution.

Report this publication

Statistics

Seen <100 times