Article Phase textures of metal–oxide nanocomposites self-orchestrated by atomic diffusions through precursor alloys

Nasrat Hannah Shudin ; Ryuto Eguchi SAMURAI ORCID (National Institute for Materials Science) ; Takeshi Fujita ; Tomoharu Tokunaga ; Ayako Hashimoto SAMURAI ORCID (National Institute for Materials Science) ; Hideki Abe SAMURAI ORCID (National Institute for Materials Science)

PCCP-MDR.pdf
Download file (1.04 MB)
Download as zip (1.03 MB)
Collection

Citation
Nasrat Hannah Shudin, Ryuto Eguchi, Takeshi Fujita, Tomoharu Tokunaga, Ayako Hashimoto, Hideki Abe. Phase textures of metal–oxide nanocomposites self-orchestrated by atomic diffusions through precursor alloys. Physical Chemistry Chemical Physics. 2024, 26 (19), 14103-14107. https://doi.org/10.1039/d3cp05157a

Description:

(abstract)

Metal-oxide nanocomposites (MONs) are of pivotal importance as electrode materials, yet lack a guiding principle to tune their phase texture. Here we report that the phase texture of MONs can be tuned at the nanoscale by controlling the nanophase separation of precursor alloys. In situ transmission electron microscopy (in situ TEM) has demonstrated that a MON material of platinum (Pt) and cerium oxide (CeO2) is obtained through promoted nanophase separation of a Pt5Ce precursor alloy in an atmosphere containing oxygen (O2) and carbon monoxide (CO). The Pt–CeO2 MON material comprised an alternating stack of nanometre-thick layers of Pt and CeO2 in different phase textures ranging from lamellae to mazes, depending on the O2 fraction in the atmosphere. Mathematical simulations have demonstrated that the phase texture of MONs originates from a balance in the atomic diffusions across the alloy precursor, which is controllable by the O2 fraction, temperature, and composition of the precursor alloys.

Rights:

Keyword: In-Situ TEM, Numerical Simulation, Reaction Diffusion, Phase Separation, Metal-Oxide Nano-composites

Date published: 2024-04-22

Publisher: Royal Society of Chemistry (RSC)

Journal:

  • Physical Chemistry Chemical Physics (ISSN: 14639084) vol. 26 issue. 19 p. 14103-14107

Funding:

  • Japan Society for the Promotion of Science 22H01799
  • Japan Science and Technology Agency JPMJFR213U

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5978

First published URL: https://doi.org/10.1039/d3cp05157a

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-12-10 08:30:10 +0900

Published on MDR: 2025-12-10 08:23:49 +0900

Filename Size
Filename PCCP-MDR.pdf (Thumbnail)
application/pdf 		Size 1.04 MB Detail