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Cost-Effective Vertical Carbon Nanosheets/Iron-Based Composites as Efficient Electrocatalysts for Water Splitting Reaction

Journal Article


Abstract


  • Developing low-cost and highly active catalysts

    is vital to achieve efficient electrochemical water splitting for

    hydrogen production, which is considered as a very promising

    approach for renewable energy storage. Herein, an efficient

    and cost-effective electrode architecture constructed by

    vertically aligned carbon nanosheets (VCNs) and iron

    oxyhydroxide/nitride (VCNs@FeOOH//VCNs@Fe4N) is

    designed and synthesized for water splitting in alkaline

    medium. Benefiting from the highly exposed active sites,

    accelerated mass and electron transport, and synergistic effect

    of multiple components, the composite electrodes deliver

    unprecedented catalytic performance with high activity and

    excellent durability. The VCNs@FeOOH composite electrode

    exhibits an overpotential of as low as 179 mV at 10 mA cm−2 for oxygen evolution reaction (OER), while VCNs@Fe4N shows a

    low overpotential of 172 mV for hydrogen evolution reaction (HER) at 10 mA cm−2

    . More significantly, a full electrolyzer cell

    with VCNs@Fe4N as the cathode and VCNs@FeOOH as the anode exhibits an appealing operation voltage of 1.6 V at 10 mA

    cm−2 with superior durability. The present results provide new insight into designing robust catalysts toward practical water

    splitting devices and metal−air batteries.

UOW Authors


  •   Zhang, Yao (external author)
  •   Rui, Kun (external author)
  •   Ma, Zhongyuan (external author)
  •   Sun, Wenping
  •   Wang, Qingqing (external author)
  •   Wu, Peng (external author)
  •   Zhang, Qiao (external author)
  •   Li, Desheng (external author)
  •   Du, Min (external author)
  •   Zhang, Weina (external author)
  •   Ling, Huijuan (external author)
  •   Zhu, Jixin (external author)

Publication Date


  • 2018

Citation


  • Zhang, Y., Rui, K., Ma, Z., Sun, W., Wang, Q., Wu, P., Zhang, Q., Li, D., Du, M., Zhang, W., Ling, H. & Zhu, J. (2018). Cost-Effective Vertical Carbon Nanosheets/Iron-Based Composites as Efficient Electrocatalysts for Water Splitting Reaction. Chemistry of Materials, 30 (14), 4762-4769.

Scopus Eid


  • 2-s2.0-85049377304

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3208

Number Of Pages


  • 7

Start Page


  • 4762

End Page


  • 4769

Volume


  • 30

Issue


  • 14

Place Of Publication


  • United States

Abstract


  • Developing low-cost and highly active catalysts

    is vital to achieve efficient electrochemical water splitting for

    hydrogen production, which is considered as a very promising

    approach for renewable energy storage. Herein, an efficient

    and cost-effective electrode architecture constructed by

    vertically aligned carbon nanosheets (VCNs) and iron

    oxyhydroxide/nitride (VCNs@FeOOH//VCNs@Fe4N) is

    designed and synthesized for water splitting in alkaline

    medium. Benefiting from the highly exposed active sites,

    accelerated mass and electron transport, and synergistic effect

    of multiple components, the composite electrodes deliver

    unprecedented catalytic performance with high activity and

    excellent durability. The VCNs@FeOOH composite electrode

    exhibits an overpotential of as low as 179 mV at 10 mA cm−2 for oxygen evolution reaction (OER), while VCNs@Fe4N shows a

    low overpotential of 172 mV for hydrogen evolution reaction (HER) at 10 mA cm−2

    . More significantly, a full electrolyzer cell

    with VCNs@Fe4N as the cathode and VCNs@FeOOH as the anode exhibits an appealing operation voltage of 1.6 V at 10 mA

    cm−2 with superior durability. The present results provide new insight into designing robust catalysts toward practical water

    splitting devices and metal−air batteries.

UOW Authors


  •   Zhang, Yao (external author)
  •   Rui, Kun (external author)
  •   Ma, Zhongyuan (external author)
  •   Sun, Wenping
  •   Wang, Qingqing (external author)
  •   Wu, Peng (external author)
  •   Zhang, Qiao (external author)
  •   Li, Desheng (external author)
  •   Du, Min (external author)
  •   Zhang, Weina (external author)
  •   Ling, Huijuan (external author)
  •   Zhu, Jixin (external author)

Publication Date


  • 2018

Citation


  • Zhang, Y., Rui, K., Ma, Z., Sun, W., Wang, Q., Wu, P., Zhang, Q., Li, D., Du, M., Zhang, W., Ling, H. & Zhu, J. (2018). Cost-Effective Vertical Carbon Nanosheets/Iron-Based Composites as Efficient Electrocatalysts for Water Splitting Reaction. Chemistry of Materials, 30 (14), 4762-4769.

Scopus Eid


  • 2-s2.0-85049377304

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/3208

Number Of Pages


  • 7

Start Page


  • 4762

End Page


  • 4769

Volume


  • 30

Issue


  • 14

Place Of Publication


  • United States