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Co-Doped Nanoporous Fe 3 P Self-Supported Electrodes for Enhanced Alkaline Hydrogen Evolution.

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Title: Co-Doped Nanoporous Fe 3 P Self-Supported Electrodes for Enhanced Alkaline Hydrogen Evolution.
Authors: Yang, Nana1 (AUTHOR), Mi, Ning1,2 (AUTHOR), Lei, Lin1,3 (AUTHOR), Xi, Kang1 (AUTHOR), Xu, Furong2 (AUTHOR), Liu, Haorui1,3 (AUTHOR)
Source: Nanomaterials (2079-4991). Jun2026, Vol. 16 Issue 12, p761. 9p.
Subjects: Hydrogen evolution reactions, Nanoporous materials, Phosphorus compounds, Electrocatalysts, Hydrogen production, Transition metal compounds
Abstract: Transition-metal phosphides are promising non-noble-metal electrocatalysts for alkaline hydrogen evolution, yet further improving their performance remains challenging. In this work, a Co-doped nanoporous Fe3P self-supported electrode was fabricated by vacuum high-frequency induction and melt spinning of Fe75Co5P20 precursor alloys, followed by electrochemical dealloying. Nanoporous Fe3P prepared from Fe80P20 was used as the reference. Structural analyses show that dealloying selectively removes the α-Fe phase while preserving the Fe3P framework, resulting in a three-dimensional nanoporous architecture. XPS results further confirm successful Co incorporation and reveal that Co doping modifies the local chemical environment of Fe and P. Benefiting from the combined effects of Co incorporation and the nanoporous structure, np-Co-Fe3P exhibits significantly improved HER performance in 1.0 M KOH, requiring only 70 mV to reach 10 mA cm−2, much lower than that of np-Fe3P (199 mV). In addition, np-Co-Fe3P shows a smaller Tafel slope of 94 mV dec−1, lower charge-transfer resistance, and a larger double-layer capacitance of 109.4 mF cm−2. This work demonstrates an effective strategy for enhancing the alkaline HER performance of Fe-based phosphides through the combination of Co incorporation and dealloying-derived nanoporous architecture. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Co-Doped Nanoporous Fe 3 P Self-Supported Electrodes for Enhanced Alkaline Hydrogen Evolution.
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  Data: <searchLink fieldCode="AR" term="%22Yang%2C+Nana%22">Yang, Nana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mi%2C+Ning%22">Mi, Ning</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lei%2C+Lin%22">Lei, Lin</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xi%2C+Kang%22">Xi, Kang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Furong%22">Xu, Furong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Haorui%22">Liu, Haorui</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jun2026, Vol. 16 Issue 12, p761. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoporous+materials%22">Nanoporous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Phosphorus+compounds%22">Phosphorus compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Electrocatalysts%22">Electrocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Transition+metal+compounds%22">Transition metal compounds</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Transition-metal phosphides are promising non-noble-metal electrocatalysts for alkaline hydrogen evolution, yet further improving their performance remains challenging. In this work, a Co-doped nanoporous Fe3P self-supported electrode was fabricated by vacuum high-frequency induction and melt spinning of Fe75Co5P20 precursor alloys, followed by electrochemical dealloying. Nanoporous Fe3P prepared from Fe80P20 was used as the reference. Structural analyses show that dealloying selectively removes the α-Fe phase while preserving the Fe3P framework, resulting in a three-dimensional nanoporous architecture. XPS results further confirm successful Co incorporation and reveal that Co doping modifies the local chemical environment of Fe and P. Benefiting from the combined effects of Co incorporation and the nanoporous structure, np-Co-Fe3P exhibits significantly improved HER performance in 1.0 M KOH, requiring only 70 mV to reach 10 mA cm−2, much lower than that of np-Fe3P (199 mV). In addition, np-Co-Fe3P shows a smaller Tafel slope of 94 mV dec−1, lower charge-transfer resistance, and a larger double-layer capacitance of 109.4 mF cm−2. This work demonstrates an effective strategy for enhancing the alkaline HER performance of Fe-based phosphides through the combination of Co incorporation and dealloying-derived nanoporous architecture. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16120761
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        Text: English
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        PageCount: 9
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        Type: general
      – SubjectFull: Nanoporous materials
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      – SubjectFull: Phosphorus compounds
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      – SubjectFull: Transition metal compounds
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    Titles:
      – TitleFull: Co-Doped Nanoporous Fe 3 P Self-Supported Electrodes for Enhanced Alkaline Hydrogen Evolution.
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            NameFull: Yang, Nana
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            NameFull: Mi, Ning
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              Text: Jun2026
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              Y: 2026
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