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Characteristics of a sintered porous Ni–Cu alloy cathode for hydrogen production in a potassium hydroxide solution.

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Title: Characteristics of a sintered porous Ni–Cu alloy cathode for hydrogen production in a potassium hydroxide solution.
Authors: Yu, Linping1,2, Lei, Ting1, Nan, Bo1, Jiang, Yao1 jiangyao@csu.edu.cn, He, Yuehui1, Liu, C.T.3
Source: Energy. Feb2016, Vol. 97, p498-505. 8p.
Subjects: Nickel alloys, Potassium hydroxide, Sintering, Porous materials, Hydrogen production, Solution (Chemistry), Cathodes
Abstract: A porous Ni–Cu alloy with a most probable pore size of 2.4 μm and an open porosity over 31.5% was synthesized by step sintering pressed compacts consisted of mixed Ni and Cu powders in a vacuum furnace. The electrocatalytic activity and stability of the fabricated porous Ni–Cu alloy as cathode for the HER (hydrogen evolution reaction) in 6.0 mol/L potassium hydroxide solution were investigated by cathodic current–potential curves, CV (cyclic voltammetry) and EIS (electrochemical impedance spectroscopy) techniques. Results show that the onset potential of the porous Ni–Cu for HER greatly shifts to the positive direction compared with the dense Ni and dense Ni–Cu alloy. The electrochemical activation energy is determined to be 26.7 kJ mol −1 for the porous Ni–Cu alloy, against 44.1 kJ mol −1 and 32.6 kJ mol −1 for the dense Ni and dense Ni–Cu alloy, respectively. The increased activity of the porous Ni–Cu alloy for HER is related to the micro-porous structure as well as synergistic interaction of Ni and Cu. Besides, the fabricated porous Ni–Cu alloy displays good corrosion resistance in potassium hydroxide solution during the immersion test, which makes it possible for long-time running as cathode in the process of hydrogen evolution reaction. [ABSTRACT FROM AUTHOR]
Copyright of 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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Header DbId: egs
DbLabel: Engineering Source
An: 113105735
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Characteristics of a sintered porous Ni–Cu alloy cathode for hydrogen production in a potassium hydroxide solution.
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  Data: <searchLink fieldCode="AR" term="%22Yu%2C+Linping%22">Yu, Linping</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lei%2C+Ting%22">Lei, Ting</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Nan%2C+Bo%22">Nan, Bo</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jiang%2C+Yao%22">Jiang, Yao</searchLink><relatesTo>1</relatesTo><i> jiangyao@csu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22He%2C+Yuehui%22">He, Yuehui</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Liu%2C+C%2ET%2E%22">Liu, C.T.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Energy%22">Energy</searchLink>. Feb2016, Vol. 97, p498-505. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Nickel+alloys%22">Nickel alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Potassium+hydroxide%22">Potassium hydroxide</searchLink><br /><searchLink fieldCode="DE" term="%22Sintering%22">Sintering</searchLink><br /><searchLink fieldCode="DE" term="%22Porous+materials%22">Porous materials</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Solution+%28Chemistry%29%22">Solution (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Cathodes%22">Cathodes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A porous Ni–Cu alloy with a most probable pore size of 2.4 μm and an open porosity over 31.5% was synthesized by step sintering pressed compacts consisted of mixed Ni and Cu powders in a vacuum furnace. The electrocatalytic activity and stability of the fabricated porous Ni–Cu alloy as cathode for the HER (hydrogen evolution reaction) in 6.0 mol/L potassium hydroxide solution were investigated by cathodic current–potential curves, CV (cyclic voltammetry) and EIS (electrochemical impedance spectroscopy) techniques. Results show that the onset potential of the porous Ni–Cu for HER greatly shifts to the positive direction compared with the dense Ni and dense Ni–Cu alloy. The electrochemical activation energy is determined to be 26.7 kJ mol −1 for the porous Ni–Cu alloy, against 44.1 kJ mol −1 and 32.6 kJ mol −1 for the dense Ni and dense Ni–Cu alloy, respectively. The increased activity of the porous Ni–Cu alloy for HER is related to the micro-porous structure as well as synergistic interaction of Ni and Cu. Besides, the fabricated porous Ni–Cu alloy displays good corrosion resistance in potassium hydroxide solution during the immersion test, which makes it possible for long-time running as cathode in the process of hydrogen evolution reaction. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of 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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        Value: 10.1016/j.energy.2015.12.138
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      – Code: eng
        Text: English
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        PageCount: 8
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      – SubjectFull: Nickel alloys
        Type: general
      – SubjectFull: Potassium hydroxide
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      – SubjectFull: Sintering
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      – SubjectFull: Porous materials
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      – SubjectFull: Hydrogen production
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      – SubjectFull: Solution (Chemistry)
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      – SubjectFull: Cathodes
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      – TitleFull: Characteristics of a sintered porous Ni–Cu alloy cathode for hydrogen production in a potassium hydroxide solution.
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            NameFull: Lei, Ting
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              Text: Feb2016
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