Dislocation-enhanced piezoelectric catalysis of KNbO3 crystal for water splitting
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909940855078912 |
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| author | Gong, Hanyu Zhang, Jiawen Zhao, Yan Xiang, Shan Zhou, Xiang Preuß, Oliver Lu, Wenjun Zhang, Yan Fang, Xufei |
| author_facet | Gong, Hanyu Zhang, Jiawen Zhao, Yan Xiang, Shan Zhou, Xiang Preuß, Oliver Lu, Wenjun Zhang, Yan Fang, Xufei |
| contents | Dislocations in oxides with ionic/covalent bonding hold the potential of harnessing versatile functionalities. Here, high-density dislocations in a large plastic zone in potassium niobate (KNbO3) crystals are mechanically introduced by room-temperature cyclic scratching to enhance piezocatalytic hydrogen production. Unlike conventional energy-intensive, time-consuming deformation at high temperature, this approach merits efficient dislocation engineering. These dislocations induce local strain and modify the electronic environment, thereby improving surface reactivity and charge separation, which are critical for piezocatalysis. This proof-of-concept offers a practical and sustainable alternative for functionalizing piezoelectric ceramics. Our findings demonstrate that surface-engineered dislocations can effectively improve the piezocatalysis, paving the way for efficient and scalable piezocatalytic applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10277 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dislocation-enhanced piezoelectric catalysis of KNbO3 crystal for water splitting Gong, Hanyu Zhang, Jiawen Zhao, Yan Xiang, Shan Zhou, Xiang Preuß, Oliver Lu, Wenjun Zhang, Yan Fang, Xufei Materials Science Dislocations in oxides with ionic/covalent bonding hold the potential of harnessing versatile functionalities. Here, high-density dislocations in a large plastic zone in potassium niobate (KNbO3) crystals are mechanically introduced by room-temperature cyclic scratching to enhance piezocatalytic hydrogen production. Unlike conventional energy-intensive, time-consuming deformation at high temperature, this approach merits efficient dislocation engineering. These dislocations induce local strain and modify the electronic environment, thereby improving surface reactivity and charge separation, which are critical for piezocatalysis. This proof-of-concept offers a practical and sustainable alternative for functionalizing piezoelectric ceramics. Our findings demonstrate that surface-engineered dislocations can effectively improve the piezocatalysis, paving the way for efficient and scalable piezocatalytic applications. |
| title | Dislocation-enhanced piezoelectric catalysis of KNbO3 crystal for water splitting |
| topic | Materials Science |
| url | https://arxiv.org/abs/2507.10277 |