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Defect electrocatalytic mechanism: concept, topological structure and perspective

Journal Article


Abstract


  • Carbon-based materials have been attracting intense interest for electrocatalysis due to their various

    merits, such as abundance, low cost, high conductivity and tunable molecular structures. However,

    to date, the electrochemical activities of these electrocatalysts are mainly attributed to different active

    dopants (e.g. N, B, P or S), leading to a common concept that heteroatom doping is essential for

    carbon-based electrocatalysts. Recently, we presented a new concept where the specific topological

    defects could activate the oxygen reduction reaction (ORR) and developed a facile method to create

    such unique defects. Subsequent research has extended this new mechanism to other reactions, such

    as the hydrogen and oxygen evolution reactions (HER and OER) and confirmed that heteroatom doping

    is not essential but that these defects can serve as actives sites for electrochemical reactions. This new

    theory then creates a new research direction in electrocatalysis. In this short review, we summarise the

    origin and presentation of the defect mechanism concept, the possible topological defect structures

    that are effective for electrochemical reactions, the formation of desirable defects, the challenges in the

    synthesis and characterization of typical defects and future research directions on the electrochemical

    defect mechanism.

Authors


  •   Jia, Yi (external author)
  •   Chen, Jun
  •   Yao, Xiangdong (external author)

Publication Date


  • 2018

Citation


  • Jia, Y., Chen, J. & Yao, X. (2018). Defect electrocatalytic mechanism: concept, topological structure and perspective. Materials Chemistry Frontiers, 2 (7), 1250-1268.

Number Of Pages


  • 18

Start Page


  • 1250

End Page


  • 1268

Volume


  • 2

Issue


  • 7

Place Of Publication


  • United Kingdom

Abstract


  • Carbon-based materials have been attracting intense interest for electrocatalysis due to their various

    merits, such as abundance, low cost, high conductivity and tunable molecular structures. However,

    to date, the electrochemical activities of these electrocatalysts are mainly attributed to different active

    dopants (e.g. N, B, P or S), leading to a common concept that heteroatom doping is essential for

    carbon-based electrocatalysts. Recently, we presented a new concept where the specific topological

    defects could activate the oxygen reduction reaction (ORR) and developed a facile method to create

    such unique defects. Subsequent research has extended this new mechanism to other reactions, such

    as the hydrogen and oxygen evolution reactions (HER and OER) and confirmed that heteroatom doping

    is not essential but that these defects can serve as actives sites for electrochemical reactions. This new

    theory then creates a new research direction in electrocatalysis. In this short review, we summarise the

    origin and presentation of the defect mechanism concept, the possible topological defect structures

    that are effective for electrochemical reactions, the formation of desirable defects, the challenges in the

    synthesis and characterization of typical defects and future research directions on the electrochemical

    defect mechanism.

Authors


  •   Jia, Yi (external author)
  •   Chen, Jun
  •   Yao, Xiangdong (external author)

Publication Date


  • 2018

Citation


  • Jia, Y., Chen, J. & Yao, X. (2018). Defect electrocatalytic mechanism: concept, topological structure and perspective. Materials Chemistry Frontiers, 2 (7), 1250-1268.

Number Of Pages


  • 18

Start Page


  • 1250

End Page


  • 1268

Volume


  • 2

Issue


  • 7

Place Of Publication


  • United Kingdom