Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells
Abstract Nanoporous metals, a class of free‐standing, high specific‐area materials, evolve from interface‐controlled self‐organization in a selective dissolution (e.g., dealloying). The process creates randomly oriented pores, in which slow mass transport has limited the functional applications of n...
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Wiley
2025-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202411695 |
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| author | Congcheng Wang Yang Li Xiangwei Geng Jiatao Mao Qing Chen |
| author_facet | Congcheng Wang Yang Li Xiangwei Geng Jiatao Mao Qing Chen |
| author_sort | Congcheng Wang |
| collection | DOAJ |
| description | Abstract Nanoporous metals, a class of free‐standing, high specific‐area materials, evolve from interface‐controlled self‐organization in a selective dissolution (e.g., dealloying). The process creates randomly oriented pores, in which slow mass transport has limited the functional applications of nanoporous metals. Here the control of the pore orientation is demonstrated with a dealloying analogy, reduction‐induced decomposition, achieved in flow cells. Via forced convection, the self‐organization is placed under the control of sufficiently rapid mass transport to suppress pore branching and align 100 nm‐wide ligaments and pores along the direction of reaction propagation, boosting the permeability by an order of magnitude while retaining the large surface area. The pore orientation can be further manipulated with a flow field for an orientation pattern akin to the expected fluid pattern, enabling a nanoporous silver electrode to deliver a peak power of 0.3 W cm−2 in a redox‐flow battery, outperforming commercial carbon electrodes. |
| format | Article |
| id | doaj-art-2025c5149fd94b759934378c6c4a0d44 |
| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-2025c5149fd94b759934378c6c4a0d442025-08-20T01:51:48ZengWileyAdvanced Science2198-38442025-02-01128n/an/a10.1002/advs.202411695Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow CellsCongcheng Wang0Yang Li1Xiangwei Geng2Jiatao Mao3Qing Chen4Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong KongDepartment of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong KongDepartment of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong KongDepartment of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong KongDepartment of Mechanical and Aerospace Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong KongAbstract Nanoporous metals, a class of free‐standing, high specific‐area materials, evolve from interface‐controlled self‐organization in a selective dissolution (e.g., dealloying). The process creates randomly oriented pores, in which slow mass transport has limited the functional applications of nanoporous metals. Here the control of the pore orientation is demonstrated with a dealloying analogy, reduction‐induced decomposition, achieved in flow cells. Via forced convection, the self‐organization is placed under the control of sufficiently rapid mass transport to suppress pore branching and align 100 nm‐wide ligaments and pores along the direction of reaction propagation, boosting the permeability by an order of magnitude while retaining the large surface area. The pore orientation can be further manipulated with a flow field for an orientation pattern akin to the expected fluid pattern, enabling a nanoporous silver electrode to deliver a peak power of 0.3 W cm−2 in a redox‐flow battery, outperforming commercial carbon electrodes.https://doi.org/10.1002/advs.202411695dealloyingnanoporous metalpore orientationporous electroderedox flow batteryself‐organization |
| spellingShingle | Congcheng Wang Yang Li Xiangwei Geng Jiatao Mao Qing Chen Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells Advanced Science dealloying nanoporous metal pore orientation porous electrode redox flow battery self‐organization |
| title | Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells |
| title_full | Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells |
| title_fullStr | Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells |
| title_full_unstemmed | Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells |
| title_short | Patterning the Pore Orientation of Nanoporous Metal via Self‐Organization in Flow Cells |
| title_sort | patterning the pore orientation of nanoporous metal via self organization in flow cells |
| topic | dealloying nanoporous metal pore orientation porous electrode redox flow battery self‐organization |
| url | https://doi.org/10.1002/advs.202411695 |
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