Oxygen evolution on Co3O4 and Li-doped Co3O4 coated electrodes in an alkaline solution

C. Bocca; G. Cerisola; E. Magnone; A. Barbucci

doi:10.1016/S0360-3199(98)00120-7

Oxygen evolution on Co₃O₄ and Li-doped Co₃O₄ coated electrodes in an alkaline solution

C. Bocca, G. Cerisola, E. Magnone, A. Barbucci

Department of Chemical and Biochemical Engineering

University of Genoa

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

The oxygen evolution reaction (OER) was investigated at 60 °C in 15 wt% NaOH solution on Co₃O₄, Li-doped Co₃O₄ and perovskite-type oxide (LaNiO₃) electrodes. Cobalt and Li-doped cobalt oxides were obtained by different preparation techniques and were applied to chemically-pickled nickel plates. The obtained phases were structurally characterized by X-ray powder diffraction. The electrodes were subjected to electrochemical measurements, before and after electrochemical ageing (21 days, 150 mA cm^-2). The correlation between the coating preparations and their electrocatalytic activity was investigated. The efficiency of the studied electrodes seems to depend on the preparation method. Two Tafel slopes for the OER were observed in most cases. This behaviour was interpreted on the basis of a change in the valence state of the surface oxide.

Original language	English
Pages (from-to)	699-707
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	24
Issue number	8
DOIs	https://doi.org/10.1016/S0360-3199(98)00120-7
State	Published - Aug 1999

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title = "Oxygen evolution on Co3O4 and Li-doped Co3O4 coated electrodes in an alkaline solution",

abstract = "The oxygen evolution reaction (OER) was investigated at 60 °C in 15 wt% NaOH solution on Co3O4, Li-doped Co3O4 and perovskite-type oxide (LaNiO3) electrodes. Cobalt and Li-doped cobalt oxides were obtained by different preparation techniques and were applied to chemically-pickled nickel plates. The obtained phases were structurally characterized by X-ray powder diffraction. The electrodes were subjected to electrochemical measurements, before and after electrochemical ageing (21 days, 150 mA cm-2). The correlation between the coating preparations and their electrocatalytic activity was investigated. The efficiency of the studied electrodes seems to depend on the preparation method. Two Tafel slopes for the OER were observed in most cases. This behaviour was interpreted on the basis of a change in the valence state of the surface oxide.",

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T1 - Oxygen evolution on Co3O4 and Li-doped Co3O4 coated electrodes in an alkaline solution

AU - Bocca, C.

AU - Cerisola, G.

AU - Magnone, E.

AU - Barbucci, A.

PY - 1999/8

Y1 - 1999/8

N2 - The oxygen evolution reaction (OER) was investigated at 60 °C in 15 wt% NaOH solution on Co3O4, Li-doped Co3O4 and perovskite-type oxide (LaNiO3) electrodes. Cobalt and Li-doped cobalt oxides were obtained by different preparation techniques and were applied to chemically-pickled nickel plates. The obtained phases were structurally characterized by X-ray powder diffraction. The electrodes were subjected to electrochemical measurements, before and after electrochemical ageing (21 days, 150 mA cm-2). The correlation between the coating preparations and their electrocatalytic activity was investigated. The efficiency of the studied electrodes seems to depend on the preparation method. Two Tafel slopes for the OER were observed in most cases. This behaviour was interpreted on the basis of a change in the valence state of the surface oxide.

AB - The oxygen evolution reaction (OER) was investigated at 60 °C in 15 wt% NaOH solution on Co3O4, Li-doped Co3O4 and perovskite-type oxide (LaNiO3) electrodes. Cobalt and Li-doped cobalt oxides were obtained by different preparation techniques and were applied to chemically-pickled nickel plates. The obtained phases were structurally characterized by X-ray powder diffraction. The electrodes were subjected to electrochemical measurements, before and after electrochemical ageing (21 days, 150 mA cm-2). The correlation between the coating preparations and their electrocatalytic activity was investigated. The efficiency of the studied electrodes seems to depend on the preparation method. Two Tafel slopes for the OER were observed in most cases. This behaviour was interpreted on the basis of a change in the valence state of the surface oxide.

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 8

ER -

Oxygen evolution on Co₃O₄ and Li-doped Co₃O₄ coated electrodes in an alkaline solution

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