Ligand-Controlled Electrodeposition of Highly Intrinsically Active and Optically Transparent NiFeOxHy Film as a Water Oxidation Electrocatalyst

• A highly intrinsically active and optically transparent NiFeOxHy water oxidation catalyst was prepared by electrodeposition of [Ni(C12-tpen)](ClO4)2 complex (Ni−C12). This NiFeOxHy film has a current density of 10 mA cm−2 with an overpotential (η) of only 298 mV at nanomolar concentration and the current density of 10 mA cm−2 remains constant over 22 h in 1 m KOH. The extremely high turnover frequency of 0.51 s−1 was obtained with η of 300 mV. More importantly, such outstanding activity and transparency (optical loss <0.5 %) of the NiFeOxHy film are attributed to a ligand effect of the dodecyl substituent in Ni−C12, which enables its future application in solar water splitting.

Ämnesord

NATURVETENSKAP  -- Kemi -- Oorganisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)

Nyckelord

electrocatalysis

electrodeposition

ligand effects

thin films

water oxidation

Electrocatalysts

Electrodes

Iron compounds

Ligands

Nickel

Oxidation

Potash

Future applications

Ligand effect

Nanomolar concentration

Overpotential

Solar water splitting

Turnover frequency

Water oxidation catalysts

Nickel compounds

ferric ion

ferric oxide

ligand

water

catalysis

chemistry

electroplating industry

oxidation reduction reaction

procedures

Electroplating

Ferric Compounds

Oxidation-Reduction

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