Looping metal-support interaction in heterogeneous catalysts during redox reactions
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866915374314815488 |
|---|---|
| author | Pan, Yue Zhen, Shiyu Liu, Xiaozhi Ge, Mengshu Zhao, Jianxiong Gu, Lin Zhou, Dan Zhang, Liang Su, Dong |
| author_facet | Pan, Yue Zhen, Shiyu Liu, Xiaozhi Ge, Mengshu Zhao, Jianxiong Gu, Lin Zhou, Dan Zhang, Liang Su, Dong |
| contents | Metal-support interfaces fundamentally govern the catalytic performance of heterogeneous systems through complex interactions. Here, utilizing operando transmission electron microscopy, we uncovered a type of looping metal-support interaction in NiFe-Fe3O4 catalysts during hydrogen oxidation reaction. At the NiFe-Fe3O4 interfaces, lattice oxygens react with NiFe-activated H atoms, gradually sacrificing themselves and resulting in dynamically migrating interfaces. Meanwhile, reduced iron atoms migrate to the {111} surface of Fe3O4 support and react with oxygen molecules. Consequently, the hydrogen oxidation reaction separates spatially on a single nanoparticle and is intrinsically coupled with the redox reaction of the Fe3O4 support through the dynamic migration of metal-support interfaces. Our work provides previously unidentified mechanistic insight into metal-support interactions and underscores the transformative potential of operando methodologies for studying atomic-scale dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_05052 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Looping metal-support interaction in heterogeneous catalysts during redox reactions Pan, Yue Zhen, Shiyu Liu, Xiaozhi Ge, Mengshu Zhao, Jianxiong Gu, Lin Zhou, Dan Zhang, Liang Su, Dong Materials Science Chemical Physics Metal-support interfaces fundamentally govern the catalytic performance of heterogeneous systems through complex interactions. Here, utilizing operando transmission electron microscopy, we uncovered a type of looping metal-support interaction in NiFe-Fe3O4 catalysts during hydrogen oxidation reaction. At the NiFe-Fe3O4 interfaces, lattice oxygens react with NiFe-activated H atoms, gradually sacrificing themselves and resulting in dynamically migrating interfaces. Meanwhile, reduced iron atoms migrate to the {111} surface of Fe3O4 support and react with oxygen molecules. Consequently, the hydrogen oxidation reaction separates spatially on a single nanoparticle and is intrinsically coupled with the redox reaction of the Fe3O4 support through the dynamic migration of metal-support interfaces. Our work provides previously unidentified mechanistic insight into metal-support interactions and underscores the transformative potential of operando methodologies for studying atomic-scale dynamics. |
| title | Looping metal-support interaction in heterogeneous catalysts during redox reactions |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2507.05052 |