Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels

Yuan Tan; Congcong Wu; Hong Lin; Jianbao Li; Bo Chi; Jian Pu; Li Jian

doi:10.1016/j.electacta.2013.12.128

Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels

Yuan Tan, Congcong Wu, Hong Lin, Jianbao Li, Bo Chi, Jian Pu, Li Jian

Materials Science and Engineering

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

45 Scopus citations

Abstract

In this paper, the electrocatalytic performance of cobaltite spinels for oxygen evolution reaction (OER) in alkaline electrolysis is studied. Cobaltites M_xCo_3-xO₄ (M= Ni, Cu, Zn, Mn; x = 1 or 0.9) are synthesized by the coprecipitation method and characterized for the OER performance. Cyclic voltammetric measurement confirms that the cobaltites exhibit different redox characteristic for Co cation couples. NiCo ₂O₄ and MnCo₂O₄ show the redox couple of Co(III)/Co(II) during OER, while for ZnCo₂O₄ and Cu_0.9Co_2.1O₄ are Co(IV)/Co(III). OER measurement reveals that all these cobaltite spinel electrodes show better performance than metal Ni electrode. And ZnCo₂O₄ shows the best performance for OER with the highest current density of 205mAcm ^-2 at potential of 0.7 V. XPS result verifies that the cobaltites have the different surface Co cations distribution. The analysis discovers that the amount of the surface Co cations occupying the octahedral sites in spinel is crucial for OER performance.

Original language	English (US)
Pages (from-to)	183-187
Number of pages	5
Journal	Electrochimica Acta
Volume	121
DOIs	https://doi.org/10.1016/j.electacta.2013.12.128
State	Published - Mar 1 2014

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2013.12.128

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@article{803524f3b8d14f7fa8fc0ab763f30608,

title = "Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels",

abstract = "In this paper, the electrocatalytic performance of cobaltite spinels for oxygen evolution reaction (OER) in alkaline electrolysis is studied. Cobaltites MxCo3-xO4 (M= Ni, Cu, Zn, Mn; x = 1 or 0.9) are synthesized by the coprecipitation method and characterized for the OER performance. Cyclic voltammetric measurement confirms that the cobaltites exhibit different redox characteristic for Co cation couples. NiCo 2O4 and MnCo2O4 show the redox couple of Co(III)/Co(II) during OER, while for ZnCo2O4 and Cu0.9Co2.1O4 are Co(IV)/Co(III). OER measurement reveals that all these cobaltite spinel electrodes show better performance than metal Ni electrode. And ZnCo2O4 shows the best performance for OER with the highest current density of 205mAcm -2 at potential of 0.7 V. XPS result verifies that the cobaltites have the different surface Co cations distribution. The analysis discovers that the amount of the surface Co cations occupying the octahedral sites in spinel is crucial for OER performance.",

author = "Yuan Tan and Congcong Wu and Hong Lin and Jianbao Li and Bo Chi and Jian Pu and Li Jian",

note = "Funding Information: The authors would like to thank the financial support from Huazhong University of Science and Technology. The authors thank the Analytical and Testing Center of Huazhong University of Science and Technology for the samples measurement assistant.",

year = "2014",

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day = "1",

doi = "10.1016/j.electacta.2013.12.128",

language = "English (US)",

volume = "121",

pages = "183--187",

journal = "Electrochimica Acta",

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T1 - Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels

AU - Tan, Yuan

AU - Wu, Congcong

AU - Lin, Hong

AU - Li, Jianbao

AU - Chi, Bo

AU - Pu, Jian

AU - Jian, Li

N1 - Funding Information: The authors would like to thank the financial support from Huazhong University of Science and Technology. The authors thank the Analytical and Testing Center of Huazhong University of Science and Technology for the samples measurement assistant.

PY - 2014/3/1

Y1 - 2014/3/1

N2 - In this paper, the electrocatalytic performance of cobaltite spinels for oxygen evolution reaction (OER) in alkaline electrolysis is studied. Cobaltites MxCo3-xO4 (M= Ni, Cu, Zn, Mn; x = 1 or 0.9) are synthesized by the coprecipitation method and characterized for the OER performance. Cyclic voltammetric measurement confirms that the cobaltites exhibit different redox characteristic for Co cation couples. NiCo 2O4 and MnCo2O4 show the redox couple of Co(III)/Co(II) during OER, while for ZnCo2O4 and Cu0.9Co2.1O4 are Co(IV)/Co(III). OER measurement reveals that all these cobaltite spinel electrodes show better performance than metal Ni electrode. And ZnCo2O4 shows the best performance for OER with the highest current density of 205mAcm -2 at potential of 0.7 V. XPS result verifies that the cobaltites have the different surface Co cations distribution. The analysis discovers that the amount of the surface Co cations occupying the octahedral sites in spinel is crucial for OER performance.

AB - In this paper, the electrocatalytic performance of cobaltite spinels for oxygen evolution reaction (OER) in alkaline electrolysis is studied. Cobaltites MxCo3-xO4 (M= Ni, Cu, Zn, Mn; x = 1 or 0.9) are synthesized by the coprecipitation method and characterized for the OER performance. Cyclic voltammetric measurement confirms that the cobaltites exhibit different redox characteristic for Co cation couples. NiCo 2O4 and MnCo2O4 show the redox couple of Co(III)/Co(II) during OER, while for ZnCo2O4 and Cu0.9Co2.1O4 are Co(IV)/Co(III). OER measurement reveals that all these cobaltite spinel electrodes show better performance than metal Ni electrode. And ZnCo2O4 shows the best performance for OER with the highest current density of 205mAcm -2 at potential of 0.7 V. XPS result verifies that the cobaltites have the different surface Co cations distribution. The analysis discovers that the amount of the surface Co cations occupying the octahedral sites in spinel is crucial for OER performance.

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Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels

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