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Description:

The structural change in Pt networks composed of multiple chain connections among grains was observed in air at 1 atm by atomic-resolution environmental cell scanning transmission electron microscopy. An aberration-corrected incident electron probe with a wide convergence angle made it possible to increase the depth resolution that contributes to enhancing the signal-to-noise ratio of Pt network samples in air in an environmental cell, resulting in the achievement of atom-ic-resolution imaging. Dynamic observation on an atomic scale suggested that the structural change of the networks was not attributed to the surface atomic diffusion-induced step motion but mainly caused by the movement and deformation of unstable grains and grain boundaries.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: scanning transmission electron microscopy, environmental cell, atomic resolution, catalyst, Pt network

Date published: 2023-07-26

Publisher: MDPI AG

Journal:

• Nanomaterials (ISSN: 20794991) vol. 13 p. 2170-2170

Funding:

• the Innovative Science and Technology Initiative for Security(ATLA) JPJ004596

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/nano13152170

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Updated at: 2024-01-05 22:14:05 +0900

Published on MDR: 2023-11-13 13:30:08 +0900