Skip to main content
placeholder image

Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst

Journal Article


Abstract


  • Oxygen evolution reaction (OER) is the bottleneck reaction of the overall water splitting process despite the intensive research in the past decades. Efficient yet stable low-cost OER catalysts have been widely explored but further improvement is still highly demanded. Herein, a type of hybrid OER catalyst was prepared by the growth of CoFe-LDH (layered double hydroxide) on the surface of Ti 3 C 2 MXene nanosheets, which exhibits superior OER performance than the state-of-the-art RuO 2 . The enhancement of the OER performance could be attributed to the combination of oxygen-breaking ability of CoFe-LDH and metallic conductivity of Ti 3 C 2 MXene substrate. Meanwhile, the direct growth of CoFe-LDH on the hydroxyl-rich surface of MXene effectively prevents itself from aggregation, exposing more CoFe-LDH edge active sites. What's more important is that the intimate interface between CoFe-LDH and Ti 3 C 2 MXene brings in efficient charge transfer and oxygen activation, which is supported by the DFT calculation results. The direct growth of CoFe-LDH on MXene endows the insulating LDH with metallic features with the O 2p states become distributed above the Fermi level which is mediated by the possible anionic redox process. This work demonstrates the great potential of MXene-based hybrid nanostructure for energy conversion applications.

UOW Authors


  •   Hao, Chongyan (external author)
  •   Wu, Yang (external author)
  •   An, Yajing (external author)
  •   Cui, Baihua (external author)
  •   Lin, Jiannan (external author)
  •   Li, Xiaoning (external author)
  •   Wang, Dianhui (external author)
  •   Jiang, Minhong (external author)
  •   Cheng, Zhenxiang
  •   Hu, Shi (external author)

Publication Date


  • 2019

Citation


  • Hao, C., Wu, Y., An, Y., Cui, B., Lin, J., Li, X., Wang, D., Jiang, M., Cheng, Z. & Hu, S. (2019). Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst. Materials Today Energy, 12 453-462.

Scopus Eid


  • 2-s2.0-85065048369

Number Of Pages


  • 9

Start Page


  • 453

End Page


  • 462

Volume


  • 12

Place Of Publication


  • United Kingdom

Abstract


  • Oxygen evolution reaction (OER) is the bottleneck reaction of the overall water splitting process despite the intensive research in the past decades. Efficient yet stable low-cost OER catalysts have been widely explored but further improvement is still highly demanded. Herein, a type of hybrid OER catalyst was prepared by the growth of CoFe-LDH (layered double hydroxide) on the surface of Ti 3 C 2 MXene nanosheets, which exhibits superior OER performance than the state-of-the-art RuO 2 . The enhancement of the OER performance could be attributed to the combination of oxygen-breaking ability of CoFe-LDH and metallic conductivity of Ti 3 C 2 MXene substrate. Meanwhile, the direct growth of CoFe-LDH on the hydroxyl-rich surface of MXene effectively prevents itself from aggregation, exposing more CoFe-LDH edge active sites. What's more important is that the intimate interface between CoFe-LDH and Ti 3 C 2 MXene brings in efficient charge transfer and oxygen activation, which is supported by the DFT calculation results. The direct growth of CoFe-LDH on MXene endows the insulating LDH with metallic features with the O 2p states become distributed above the Fermi level which is mediated by the possible anionic redox process. This work demonstrates the great potential of MXene-based hybrid nanostructure for energy conversion applications.

UOW Authors


  •   Hao, Chongyan (external author)
  •   Wu, Yang (external author)
  •   An, Yajing (external author)
  •   Cui, Baihua (external author)
  •   Lin, Jiannan (external author)
  •   Li, Xiaoning (external author)
  •   Wang, Dianhui (external author)
  •   Jiang, Minhong (external author)
  •   Cheng, Zhenxiang
  •   Hu, Shi (external author)

Publication Date


  • 2019

Citation


  • Hao, C., Wu, Y., An, Y., Cui, B., Lin, J., Li, X., Wang, D., Jiang, M., Cheng, Z. & Hu, S. (2019). Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst. Materials Today Energy, 12 453-462.

Scopus Eid


  • 2-s2.0-85065048369

Number Of Pages


  • 9

Start Page


  • 453

End Page


  • 462

Volume


  • 12

Place Of Publication


  • United Kingdom