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Dendritic core-shell nickel-iron-copper metal/metal oxide electrode for efficient electrocatalytic water oxidation

Author

Listed:
  • Peili Zhang

    (KTH Royal Institute of Technology)

  • Lin Li

    (Stanford University)

  • Dennis Nordlund

    (SLAC National Accelerator Laboratory)

  • Hong Chen

    (KTH Royal Institute of Technology)

  • Lizhou Fan

    (KTH Royal Institute of Technology)

  • Biaobiao Zhang

    (KTH Royal Institute of Technology)

  • Xia Sheng

    (KTH Royal Institute of Technology)

  • Quentin Daniel

    (KTH Royal Institute of Technology)

  • Licheng Sun

    (KTH Royal Institute of Technology
    Dalian University of Technology)

Abstract

Electrochemical water splitting requires efficient water oxidation catalysts to accelerate the sluggish kinetics of water oxidation reaction. Here, we report a promisingly dendritic core-shell nickel-iron-copper metal/metal oxide electrode, prepared via dealloying with an electrodeposited nickel-iron-copper alloy as a precursor, as the catalyst for water oxidation. The as-prepared core-shell nickel-iron-copper electrode is characterized with porous oxide shells and metallic cores. This tri-metal-based core-shell nickel-iron-copper electrode exhibits a remarkable activity toward water oxidation in alkaline medium with an overpotential of only 180 mV at a current density of 10 mA cm−2. The core-shell NiFeCu electrode exhibits pH-dependent oxygen evolution reaction activity on the reversible hydrogen electrode scale, suggesting that non-concerted proton-electron transfers participate in catalyzing the oxygen evolution reaction. To the best of our knowledge, the as-fabricated core-shell nickel-iron-copper is one of the most promising oxygen evolution catalysts.

Suggested Citation

  • Peili Zhang & Lin Li & Dennis Nordlund & Hong Chen & Lizhou Fan & Biaobiao Zhang & Xia Sheng & Quentin Daniel & Licheng Sun, 2018. "Dendritic core-shell nickel-iron-copper metal/metal oxide electrode for efficient electrocatalytic water oxidation," Nature Communications, Nature, vol. 9(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-017-02429-9
    DOI: 10.1038/s41467-017-02429-9
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