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Boosting bifunctional oxygen electrocatalysis with atomically dispersed Fe and Co dual-metal sites for flexible zinc-air batteries.

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Title: Boosting bifunctional oxygen electrocatalysis with atomically dispersed Fe and Co dual-metal sites for flexible zinc-air batteries.
Authors: Wang, Youning1 (AUTHOR), Pan, Shencheng1 (AUTHOR), Lu, Zhenjie1 (AUTHOR), Jia, Zixin1 (AUTHOR), Sun, Jingwen1 (AUTHOR), Vasiliev, Aleksandr L.2 (AUTHOR), Kulesza, Pawel J.3 (AUTHOR), Wang, Xin1 (AUTHOR), Zhu, Junwu1 (AUTHOR), Fu, Yongsheng1 (AUTHOR) fuyongsheng@njust.edu.cn
Source: Chemical Engineering Science. Dec2023, Vol. 282, pN.PAG-N.PAG. 1p.
Subjects: Electrocatalysis, Oxygen reduction, Scanning electrochemical microscopy, Oxygen evolution reactions, Energy storage, Activation energy, Charge exchange, Oxygen, Hydrogen evolution reactions
Abstract: [Display omitted] • Synergistic effects in FeN 4 @CoN 4 promote oxygen electrocatalysis. • The ORR activity of Fe/CoNx-C was characterized via SECM. • Hierarchical porous Fe/CoN x -C displays bifunctional activity. • Fe/CoN x -C cathode excels in liquid and quasi-solid Zn-air battery. Rechargeable zinc-air batteries (ZABs) hold enormous promise as energy conversion and storage system of the next generation. Here, through utilizing the Co/ZIF-8@F127 precursor and a coordinated strategy that includes 'post-absorption' and 'dual-pyrolysis', a Fe/CoN x -C possesses a hierarchical porous N-doped carbon with an ultrahigh specific area and rich defects to stabilize accessible dual metallic active sites. With a narrow potential gap of 0.71 V, the Fe/CoN x -C catalyst demonstrates excellent bifunctional electrocatalytic activity toward the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Noteworthily, scanning electrochemical microscopy (SECM) was used to visualize the local electrocatalytic ORR activity of CoN x -C and Fe/CoN x -C. For the applications of zinc-air batteries, the Fe/CoN x -C-based cathode provides a high peak power density of 134.97 mW cm−2 for aqueous ZABs. Moreover, quasi-solid-state ZABs (including flexible ZAB and cell ZAB)-based on Fe/CoN x -C as cathode catalyst demonstrate satisfying flexibility and durability. The theoretical calculation results further elucidate the synergistic effect that the engagement of Fe atoms in the electron transfer process of the FeN 4 @CoN 4 system reduces the energy barrier of the rate-determining-step in ORR and OER, hence facilitating the reversible oxygen electrocatalytic kinetics. [ABSTRACT FROM AUTHOR]
Copyright of Chemical Engineering Science 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.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Boosting bifunctional oxygen electrocatalysis with atomically dispersed Fe and Co dual-metal sites for flexible zinc-air batteries.
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Youning%22">Wang, Youning</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Shencheng%22">Pan, Shencheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Zhenjie%22">Lu, Zhenjie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Zixin%22">Jia, Zixin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Jingwen%22">Sun, Jingwen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vasiliev%2C+Aleksandr+L%2E%22">Vasiliev, Aleksandr L.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kulesza%2C+Pawel+J%2E%22">Kulesza, Pawel J.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xin%22">Wang, Xin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Junwu%22">Zhu, Junwu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Yongsheng%22">Fu, Yongsheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fuyongsheng@njust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Engineering+Science%22">Chemical Engineering Science</searchLink>. Dec2023, Vol. 282, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Electrocatalysis%22">Electrocatalysis</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+reduction%22">Oxygen reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electrochemical+microscopy%22">Scanning electrochemical microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+evolution+reactions%22">Oxygen evolution reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br /><searchLink fieldCode="DE" term="%22Activation+energy%22">Activation energy</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+exchange%22">Charge exchange</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen%22">Oxygen</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+evolution+reactions%22">Hydrogen evolution reactions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: [Display omitted] • Synergistic effects in FeN 4 @CoN 4 promote oxygen electrocatalysis. • The ORR activity of Fe/CoNx-C was characterized via SECM. • Hierarchical porous Fe/CoN x -C displays bifunctional activity. • Fe/CoN x -C cathode excels in liquid and quasi-solid Zn-air battery. Rechargeable zinc-air batteries (ZABs) hold enormous promise as energy conversion and storage system of the next generation. Here, through utilizing the Co/ZIF-8@F127 precursor and a coordinated strategy that includes 'post-absorption' and 'dual-pyrolysis', a Fe/CoN x -C possesses a hierarchical porous N-doped carbon with an ultrahigh specific area and rich defects to stabilize accessible dual metallic active sites. With a narrow potential gap of 0.71 V, the Fe/CoN x -C catalyst demonstrates excellent bifunctional electrocatalytic activity toward the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). Noteworthily, scanning electrochemical microscopy (SECM) was used to visualize the local electrocatalytic ORR activity of CoN x -C and Fe/CoN x -C. For the applications of zinc-air batteries, the Fe/CoN x -C-based cathode provides a high peak power density of 134.97 mW cm−2 for aqueous ZABs. Moreover, quasi-solid-state ZABs (including flexible ZAB and cell ZAB)-based on Fe/CoN x -C as cathode catalyst demonstrate satisfying flexibility and durability. The theoretical calculation results further elucidate the synergistic effect that the engagement of Fe atoms in the electron transfer process of the FeN 4 @CoN 4 system reduces the energy barrier of the rate-determining-step in ORR and OER, hence facilitating the reversible oxygen electrocatalytic kinetics. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical Engineering Science 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:
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      – Type: doi
        Value: 10.1016/j.ces.2023.119304
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Electrocatalysis
        Type: general
      – SubjectFull: Oxygen reduction
        Type: general
      – SubjectFull: Scanning electrochemical microscopy
        Type: general
      – SubjectFull: Oxygen evolution reactions
        Type: general
      – SubjectFull: Energy storage
        Type: general
      – SubjectFull: Activation energy
        Type: general
      – SubjectFull: Charge exchange
        Type: general
      – SubjectFull: Oxygen
        Type: general
      – SubjectFull: Hydrogen evolution reactions
        Type: general
    Titles:
      – TitleFull: Boosting bifunctional oxygen electrocatalysis with atomically dispersed Fe and Co dual-metal sites for flexible zinc-air batteries.
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            NameFull: Wang, Youning
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            NameFull: Pan, Shencheng
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            NameFull: Lu, Zhenjie
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            NameFull: Wang, Xin
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            – D: 05
              M: 12
              Text: Dec2023
              Type: published
              Y: 2023
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              Value: 282
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