Dynamics of dislocation formations and their impacts on exsolution in Ru-doped perovskite oxide
10 affiliations
- 1Center for Ultrafast Phase Transformation, Department of Physics, Sogang University, Seoul, Korea
- 2Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul, Korea
- 3Center for Ultrafast Phase Transformation, Department of Physics, Sogang University, Seoul, Korea. [email protected]
- 4Advanced Photon Source, Argonne National Laboratory, Lemont, IL, USA
- 5Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul, Korea
- 6Department of Materials Science and Engineering, Seoul National University, Seoul, Korea
- 7Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, Korea
- 8Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul, Korea. [email protected]
- 9Nanomaterials Science and Engineering, Korea University of Science and Technology (UST), KIST Campus, Seoul, Korea. [email protected]
- 10Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul, Korea. [email protected]
Abstract
Self-assembled metal nanoparticles exsolved from host oxides have gained prominence in catalysis and electrochemistry owing to their exceptional activity and stability 1–3 . Understanding the relation between dopant transport and exsolution is important, as the transport mechanism of dopants toward the surface of the host oxide directly influences exsolution sites, density, and dispersion, ultimately determining catalytic functionality 4–6 . However, the pathways for dopant transport and their interaction with internal defects during exsolution remain unclear because of the complexity of defects hidden in bulk. Here, we reveal the exsolution pathway mediated by dislocation evolution within a host oxide perovskite. By employing in situ Bragg coherent X-ray diffraction imaging and transmission electron microscopy, we show that dislocations nucleate in the bulk interior and propagate to the surface during the reduction of Ru-doped in BaCe 0.85 Y 0.1 Ru 0.05 O 3-δ . Moreover, we verify that the Ru dopant is specifically correlated with the formation of mixed dislocations, which then provide transport pathways for the exsolution of Ru nanoparticles. These findings advance our understanding of dislocation dynamics and support the development of exsolved metal nanoparticles for next-generation catalysts 7,8 .
Related
- Boosting solid oxide H 2 O and CO 2 co-electrolysis on Sr 2− x Fe 1.5− y Mo 0.5 Ni y O 6± δ by in situ exsolution of FeNi alloy nanoparticles
- Controlling Interfacial and Bulk Charge Transport in Exsolution Catalysts for High-Activity Water Oxidation
- Sub-Picosecond Optical Dynamics in Perovskite NdNiO₃ Thin Films via Broadband Pump-Probe Ellipsometry.
- Exsolution of metal nanoparticles by control of point defects
- Dynamic Atomic Displacements and Athermal Dislocation Glide in Crystals
BibTeX
@article{choi2026dynamics,
title = {{Dynamics of dislocation formations and their impacts on exsolution in Ru-doped perovskite oxide}},
author = {Sungwook Choi and Younghwan Lim and Puspendu Guha and Hayoung Kim and Sungwon Kim and Sungwon Kim and Ross Harder and Wonsuk Cha and Hoyoung Suh and Jinseok Ryu and Sungeun Yang and Ho‐Il Ji and Deok‐Hwang Kwon and Hyunjung Kim},
journal = {Nature Communications},
year = {2026},
month = may,
doi = {10.1038/s41467-026-73457-7},
url = {https://doi.org/10.1038/s41467-026-73457-7},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Dynamics of dislocation formations and their impacts on exsolution in Ru-doped perovskite oxide
AU - Sungwook Choi
AU - Younghwan Lim
AU - Puspendu Guha
AU - Hayoung Kim
AU - Sungwon Kim
AU - Sungwon Kim
AU - Ross Harder
AU - Wonsuk Cha
AU - Hoyoung Suh
AU - Jinseok Ryu
AU - Sungeun Yang
AU - Ho‐Il Ji
AU - Deok‐Hwang Kwon
AU - Hyunjung Kim
PY - 2026
DA - 2026/05/25
JO - Nature Communications
DO - 10.1038/s41467-026-73457-7
UR - https://doi.org/10.1038/s41467-026-73457-7
AB - Self-assembled metal nanoparticles exsolved from host oxides have gained prominence in catalysis and electrochemistry owing to their exceptional activity and stability 1–3 . Understanding the relation between dopant transport and exsolution is important, as the transport mechanism of dopants toward the surface of the host oxide directly influences exsolution sites, density, and dispersion, ultimately determining catalytic functionality 4–6 . However, the pathways for dopant transport and their interaction with internal defects during exsolution remain unclear because of the complexity of defects hidden in bulk. Here, we reveal the exsolution pathway mediated by dislocation evolution within a host oxide perovskite. By employing in situ Bragg coherent X-ray diffraction imaging and transmission electron microscopy, we show that dislocations nucleate in the bulk interior and propagate to the surface during the reduction of Ru-doped in BaCe 0.85 Y 0.1 Ru 0.05 O 3-δ . Moreover, we verify that the Ru dopant is specifically correlated with the formation of mixed dislocations, which then provide transport pathways for the exsolution of Ru nanoparticles. These findings advance our understanding of dislocation dynamics and support the development of exsolved metal nanoparticles for next-generation catalysts 7,8 .
SN - 2041-1723
ER -