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Defect engineering of Ni3N/Mo2C heterostructure for enhanced alkaline hydrogen evolution reaction performance.

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Title: Defect engineering of Ni3N/Mo2C heterostructure for enhanced alkaline hydrogen evolution reaction performance.
Authors: Rafaqat, Muhammad1,2 (AUTHOR), Shen, Lisha1,2 (AUTHOR) shenls@ms.giec.ac.cn, Munawar, Tauseef2 (AUTHOR), Zhiming, Tu2 (AUTHOR), Zhao, Chenglin1,2 (AUTHOR), Wang, Zhida1,2 (AUTHOR), Tan, Hongyi1 (AUTHOR), Guo, Changqing2 (AUTHOR), Yan, Chang-Feng1,2 (AUTHOR) yancf@ms.giec.ac.cn
Source: International Journal of Hydrogen Energy. Jan2026, Vol. 198, pN.PAG-N.PAG. 1p.
Subjects: Hydrogen evolution reactions, Electrocatalysts, Zinc ions, Water electrolysis, Hydrothermal synthesis, Materials science, Hydrogen production
Abstract: Electrocatalytic water splitting is being considered an effective approach to address the increasing energy crises and environmental issues. But it still suffers from a lack of efficient and stable electrocatalysts. Developing electrocatalysts through an integration of defect engineering and heterojunction engineering could be a reliable solution for improved activity, stability, and practicability. In this context, a heterostructure of Ni 3 N/Mo 2 C@CP was synthesized using a facile hydrothermal method and two-step heating treatment, including carbonization and nitridation. Moreover, the defects were intentionally produced by zinc intermediate doping in Ni 3 N/Mo 2 C@CP. The ratio of Zn versus Ni and Mo metal precursor was gradually increased to optimize the defects in Ni 3 N/Mo 2 C@CP heterostructure for excellent HER performance. Eventually, the optimized defect-rich Ni 3 N/Mo 2 C@CP-0.3 heterostructure requires only a small overpotential of 65 mV to attain the current density of 10 mA cm−2, indicating a remarkable HER performance. Apart from the HER activity, defect-rich Ni 3 N/Mo 2 C@CP-0.3 heterostructure exhibited long-term stability over 112 h for continuous electrochemical hydrogen production. [Display omitted] • A heterostructure of Ni 3 N/Mo 2 C synthesized using a facile hydrothermal method. • Defects introduced in the catalysts using Zn as an intermediate. • Defects optimized in Ni 3 N/Mo 2 C by tuning dopant to precursor ratio. • Nickel vacancies and edge dislocation defects observed simultaneously. • Defect-rich Ni 3 N/Mo 2 C@CP-0.3 showed good HER performance (η 10 = 65 mV). [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 190372164
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PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Defect engineering of Ni3N/Mo2C heterostructure for enhanced alkaline hydrogen evolution reaction performance.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Rafaqat%2C+Muhammad%22">Rafaqat, Muhammad</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+Lisha%22">Shen, Lisha</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> shenls@ms.giec.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Munawar%2C+Tauseef%22">Munawar, Tauseef</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhiming%2C+Tu%22">Zhiming, Tu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Chenglin%22">Zhao, Chenglin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhida%22">Wang, Zhida</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tan%2C+Hongyi%22">Tan, Hongyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Changqing%22">Guo, Changqing</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Chang-Feng%22">Yan, Chang-Feng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> yancf@ms.giec.ac.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Jan2026, Vol. 198, pN.PAG-N.PAG. 1p.
– Name: Subject
  Label: Subjects
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  Data: <searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Electrocatalysts%22">Electrocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Zinc+ions%22">Zinc ions</searchLink><br /><searchLink fieldCode="DE" term="%22Water+electrolysis%22">Water electrolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrothermal+synthesis%22">Hydrothermal synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+science%22">Materials science</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Electrocatalytic water splitting is being considered an effective approach to address the increasing energy crises and environmental issues. But it still suffers from a lack of efficient and stable electrocatalysts. Developing electrocatalysts through an integration of defect engineering and heterojunction engineering could be a reliable solution for improved activity, stability, and practicability. In this context, a heterostructure of Ni 3 N/Mo 2 C@CP was synthesized using a facile hydrothermal method and two-step heating treatment, including carbonization and nitridation. Moreover, the defects were intentionally produced by zinc intermediate doping in Ni 3 N/Mo 2 C@CP. The ratio of Zn versus Ni and Mo metal precursor was gradually increased to optimize the defects in Ni 3 N/Mo 2 C@CP heterostructure for excellent HER performance. Eventually, the optimized defect-rich Ni 3 N/Mo 2 C@CP-0.3 heterostructure requires only a small overpotential of 65 mV to attain the current density of 10 mA cm−2, indicating a remarkable HER performance. Apart from the HER activity, defect-rich Ni 3 N/Mo 2 C@CP-0.3 heterostructure exhibited long-term stability over 112 h for continuous electrochemical hydrogen production. [Display omitted] • A heterostructure of Ni 3 N/Mo 2 C synthesized using a facile hydrothermal method. • Defects introduced in the catalysts using Zn as an intermediate. • Defects optimized in Ni 3 N/Mo 2 C by tuning dopant to precursor ratio. • Nickel vacancies and edge dislocation defects observed simultaneously. • Defect-rich Ni 3 N/Mo 2 C@CP-0.3 showed good HER performance (η 10 = 65 mV). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Hydrogen Energy is the property of Pergamon Press - An Imprint of Elsevier Science 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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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijhydene.2025.152766
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Hydrogen evolution reactions
        Type: general
      – SubjectFull: Electrocatalysts
        Type: general
      – SubjectFull: Zinc ions
        Type: general
      – SubjectFull: Water electrolysis
        Type: general
      – SubjectFull: Hydrothermal synthesis
        Type: general
      – SubjectFull: Materials science
        Type: general
      – SubjectFull: Hydrogen production
        Type: general
    Titles:
      – TitleFull: Defect engineering of Ni3N/Mo2C heterostructure for enhanced alkaline hydrogen evolution reaction performance.
        Type: main
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            NameFull: Rafaqat, Muhammad
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            NameFull: Shen, Lisha
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            NameFull: Munawar, Tauseef
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            NameFull: Zhiming, Tu
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            NameFull: Zhao, Chenglin
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            NameFull: Wang, Zhida
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            NameFull: Tan, Hongyi
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            NameFull: Guo, Changqing
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            NameFull: Yan, Chang-Feng
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            – D: 07
              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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              Value: 03603199
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              Value: 198
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            – TitleFull: International Journal of Hydrogen Energy
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