Details

Autor(en) / Beteiligte

• Ali Akbari, Mohammad Saleh
• Bagheri, Robabeh
• Song, Zhenlun
• Najafpour, Mohammad Mahdi

Titel

Oxygen-evolution reaction by nickel/nickel oxide interface in the presence of ferrate(VI)

Ist Teil von

• Scientific reports, 2020-05, Vol.10 (1), p.8757, Article 8757

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2020

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• In this study, we investigate the effect of K FeO , as a new and soluble Fe salt at alkaline conditions, on oxygen-evolution reaction (OER) of Ni oxide. Both oxidation and reduction peaks for Ni in the presence and absence of Fe are linearly changed by (scan rate) . Immediately after the interaction of [FeO ] with the surface of the electrode, a significant increase in OER is observed. This could be indicative of the fact that either the [FeO ] on the surface of Ni oxide is directly involved in OER, or, it is important to activate Ni oxide toward OER. Due to the change in the Ni(II)/(III) peak, it is hypothesized that Fe impurity in KOH or electrochemical cell has different effects at the potential range. At low potential, [FeO ] is reduced on the surface of the electrode, and thus, is significantly adsorbed on the electrode. Finally, oxygen-evolution measurements of K FeO and Ni O are investigated under chemical conditions. K FeO is not stable in the presence of Ni(II) oxide, and OER is observed in a KOH solution (pH ≈ 13).