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Physical insights into alkaline overall water splitting with NiO microflowers electrodes with ultra-low amount of Pt catalyst.

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Title: Physical insights into alkaline overall water splitting with NiO microflowers electrodes with ultra-low amount of Pt catalyst.
Authors: Bruno, Luca1,2 (AUTHOR), Battiato, Sergio1,2 (AUTHOR), Scuderi, Mario3 (AUTHOR), Priolo, Francesco1 (AUTHOR), Terrasi, Antonio1,2 (AUTHOR), Mirabella, Salvo1,2 (AUTHOR) salvo.mirabella@dfa.unict.it
Source: International Journal of Hydrogen Energy. Sep2022, Vol. 47 Issue 80, p33988-33998. 11p.
Subjects: Hydrogen evolution reactions, Electrode performance, Platinum nanoparticles, Electrodes, Electrochemical analysis, Electric batteries, Catalysts, Photoelectrochemistry
Abstract: Electrochemical water splitting represents a promising alternative to conventional carbon-based energy sources. The hydrogen evolution reaction (HER) is a key process, still if conducted in alkaline media, its kinetics is slow thus requiring high amount of Pt based catalysts. Extensive research has been focused on reducing Pt utilization by pursuing careful electrode investigation. Here, a low-cost chemical methodology is reported to obtain large amount of microflowers made of interconnected NiO nanowalls (20 nm thick) wisely decorated with ultralow amounts of Pt nanoparticles. These decorated microflowers, dispersed onto graphene paper by drop casting, build a high performance HER electrode exhibiting an overpotential of only 66 mV at current density of 10 mA cm−2 under alkaline conditions. Intrinsic activity of catalyst was evaluated by measuring the Tafel plot (as low as 82 mV/dec) and turnover frequencies (2.07 s−1 for a Pt loading of 11.2 μg cm−2). The effect of Pt decoration has been modelled through energy band bending supported by electrochemical analyses. A full cell for alkaline electrochemical water splitting has been built, composed of Pt decorated NiO microflowers as cathode and bare NiO microflowers as anode, showing a low potential of 1.57 V to afford a current density of 10 mA cm−2 and a good long-term stability. The reported results pave the way towards an extensive utilization of Ni based nanostructures with ultralow Pt content for efficient electrochemical water splitting. • Pt nanoparticles decoration of NiO microflowers. • Effect of decoration on Hydrogen Evolution Reaction mechanism and on energy band modification of NiO. • Overall water splitting with NiO and Pt–NiO electrodes in alkaline conditions. [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
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  Label: Title
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  Data: Physical insights into alkaline overall water splitting with NiO microflowers electrodes with ultra-low amount of Pt catalyst.
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  Data: <searchLink fieldCode="AR" term="%22Bruno%2C+Luca%22">Bruno, Luca</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Battiato%2C+Sergio%22">Battiato, Sergio</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Scuderi%2C+Mario%22">Scuderi, Mario</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Priolo%2C+Francesco%22">Priolo, Francesco</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Terrasi%2C+Antonio%22">Terrasi, Antonio</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mirabella%2C+Salvo%22">Mirabella, Salvo</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> salvo.mirabella@dfa.unict.it</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Hydrogen+Energy%22">International Journal of Hydrogen Energy</searchLink>. Sep2022, Vol. 47 Issue 80, p33988-33998. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Electrode+performance%22">Electrode performance</searchLink><br /><searchLink fieldCode="DE" term="%22Platinum+nanoparticles%22">Platinum nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Electrodes%22">Electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+batteries%22">Electric batteries</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Photoelectrochemistry%22">Photoelectrochemistry</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Electrochemical water splitting represents a promising alternative to conventional carbon-based energy sources. The hydrogen evolution reaction (HER) is a key process, still if conducted in alkaline media, its kinetics is slow thus requiring high amount of Pt based catalysts. Extensive research has been focused on reducing Pt utilization by pursuing careful electrode investigation. Here, a low-cost chemical methodology is reported to obtain large amount of microflowers made of interconnected NiO nanowalls (20 nm thick) wisely decorated with ultralow amounts of Pt nanoparticles. These decorated microflowers, dispersed onto graphene paper by drop casting, build a high performance HER electrode exhibiting an overpotential of only 66 mV at current density of 10 mA cm−2 under alkaline conditions. Intrinsic activity of catalyst was evaluated by measuring the Tafel plot (as low as 82 mV/dec) and turnover frequencies (2.07 s−1 for a Pt loading of 11.2 μg cm−2). The effect of Pt decoration has been modelled through energy band bending supported by electrochemical analyses. A full cell for alkaline electrochemical water splitting has been built, composed of Pt decorated NiO microflowers as cathode and bare NiO microflowers as anode, showing a low potential of 1.57 V to afford a current density of 10 mA cm−2 and a good long-term stability. The reported results pave the way towards an extensive utilization of Ni based nanostructures with ultralow Pt content for efficient electrochemical water splitting. • Pt nanoparticles decoration of NiO microflowers. • Effect of decoration on Hydrogen Evolution Reaction mechanism and on energy band modification of NiO. • Overall water splitting with NiO and Pt–NiO electrodes in alkaline conditions. [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.2022.08.005
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 11
        StartPage: 33988
    Subjects:
      – SubjectFull: Hydrogen evolution reactions
        Type: general
      – SubjectFull: Electrode performance
        Type: general
      – SubjectFull: Platinum nanoparticles
        Type: general
      – SubjectFull: Electrodes
        Type: general
      – SubjectFull: Electrochemical analysis
        Type: general
      – SubjectFull: Electric batteries
        Type: general
      – SubjectFull: Catalysts
        Type: general
      – SubjectFull: Photoelectrochemistry
        Type: general
    Titles:
      – TitleFull: Physical insights into alkaline overall water splitting with NiO microflowers electrodes with ultra-low amount of Pt catalyst.
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            NameFull: Bruno, Luca
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            NameFull: Battiato, Sergio
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            NameFull: Scuderi, Mario
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            NameFull: Priolo, Francesco
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            NameFull: Terrasi, Antonio
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            NameFull: Mirabella, Salvo
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            – D: 19
              M: 09
              Text: Sep2022
              Type: published
              Y: 2022
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              Value: 47
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              Value: 80
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            – TitleFull: International Journal of Hydrogen Energy
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