Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915021143932928 |
|---|---|
| author | Lee, Daewon Oaks-Leaf, Sam Betzler, Sophia B. Shi, Yifeng Zhou, Siyu Ophus, Colin Wang, Lin-Wang Asta, Mark Xia, Younan Limmer, David T. Zheng, Haimei |
| author_facet | Lee, Daewon Oaks-Leaf, Sam Betzler, Sophia B. Shi, Yifeng Zhou, Siyu Ophus, Colin Wang, Lin-Wang Asta, Mark Xia, Younan Limmer, David T. Zheng, Haimei |
| contents | Solute-intercalation-induced phase separation creates spatial heterogeneities in host materials, a phenomenon ubiquitous in batteries, hydrogen storage, and other energy devices. Despite many efforts, probing intercalation processes at the atomic scale has been a significant challenge. We study hydrogen (de)intercalation in palladium nanocrystals as a model system and achieve atomic-resolution imaging of hydrogen intercalation wave dynamics by utilizing liquid-phase transmission electron microscopy. Our observations reveal that intercalation wave mechanisms, instead of shrinking-core mechanisms, prevail at ambient temperature for palladium nanocubes ranging from ~60 nm down to ~10 nm. We uncover the atomic evolution of hydrogen intercalation wave transitioning from non-planar and inclined boundaries to those closely aligned with {100} planes. Our kinetic Monte Carlo simulations demonstrate the observed intercalation wave dynamics correspond to sorption pathways minimizing the lattice mismatch strain at the phase boundary. Unveiling the atomic intercalation pathways holds profound implications for engineering intercalation-mediated devices and advancements in energy sciences. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_02416 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals Lee, Daewon Oaks-Leaf, Sam Betzler, Sophia B. Shi, Yifeng Zhou, Siyu Ophus, Colin Wang, Lin-Wang Asta, Mark Xia, Younan Limmer, David T. Zheng, Haimei Statistical Mechanics Materials Science Chemical Physics Solute-intercalation-induced phase separation creates spatial heterogeneities in host materials, a phenomenon ubiquitous in batteries, hydrogen storage, and other energy devices. Despite many efforts, probing intercalation processes at the atomic scale has been a significant challenge. We study hydrogen (de)intercalation in palladium nanocrystals as a model system and achieve atomic-resolution imaging of hydrogen intercalation wave dynamics by utilizing liquid-phase transmission electron microscopy. Our observations reveal that intercalation wave mechanisms, instead of shrinking-core mechanisms, prevail at ambient temperature for palladium nanocubes ranging from ~60 nm down to ~10 nm. We uncover the atomic evolution of hydrogen intercalation wave transitioning from non-planar and inclined boundaries to those closely aligned with {100} planes. Our kinetic Monte Carlo simulations demonstrate the observed intercalation wave dynamics correspond to sorption pathways minimizing the lattice mismatch strain at the phase boundary. Unveiling the atomic intercalation pathways holds profound implications for engineering intercalation-mediated devices and advancements in energy sciences. |
| title | Atomic evolution of hydrogen intercalation wave dynamics in palladium nanocrystals |
| topic | Statistical Mechanics Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2404.02416 |