Electrochemical Study of the Energetics of the Oxygen Evolution Reaction at Nickel Iron (Oxy)Hydroxide Catalysts

Electrochemical Study of the Energetics of the Oxygen Evolution Reaction at Nickel Iron (Oxy)Hydroxide Catalysts

Iron-doped nickel (oxy)­hydroxide catalysts (Fe x Ni1–x OOH) exhibit high electrocatalytic behavior for the oxygen evolution reaction in base. Recent findings suggest that the incorporation of Fe3+ into a NiOOH lattice leads to nearly optimal adsorption energies for OER intermediates on active Fe si...

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Veröffentlicht in:Journal of physical chemistry. C 2015-08, Vol.119 (33), p.19022-19029
Hauptverfasser: Swierk, John R, Klaus, Shannon, Trotochaud, Lena, Bell, Alexis T, Tilley, T. Don
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container_end_page 19029
container_issue 33
container_start_page 19022
container_title Journal of physical chemistry. C
container_volume 119
creator Swierk, John R
Klaus, Shannon
Trotochaud, Lena
Bell, Alexis T
Tilley, T. Don
description Iron-doped nickel (oxy)­hydroxide catalysts (Fe x Ni1–x OOH) exhibit high electrocatalytic behavior for the oxygen evolution reaction in base. Recent findings suggest that the incorporation of Fe3+ into a NiOOH lattice leads to nearly optimal adsorption energies for OER intermediates on active Fe sites. Utilizing electrochemical impedance spectroscopy and activation energy measurements, we find that pure NiOOH and FeOOH catalysts exhibit exceedingly high Faradaic resistances and activation energies 40–50 kJ/mol−1 higher than those of the most active Fe x Ni1–x OOH catalysts. Furthermore, the most active Fe x Ni1–x OOH catalysts in this study exhibit activation energies that approach those previously reported for IrO2 OER catalysts.
doi_str_mv 10.1021/acs.jpcc.5b05861
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title Electrochemical Study of the Energetics of the Oxygen Evolution Reaction at Nickel Iron (Oxy)Hydroxide Catalysts
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