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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 183-187 |
| Number of pages | 5 |
| Journal | Electrochimica Acta |
| Volume | 121 |
| DOIs | |
| State | Published - Mar 1 2014 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Electrochemistry
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Insight the effect of surface Co cations on the electrocatalytic oxygen evolution properties of cobaltite spinels. / Tan, Yuan; Wu, Congcong; Lin, Hong; Li, Jianbao; Chi, Bo; Pu, Jian; Jian, Li.
In: Electrochimica Acta, Vol. 121, 01.03.2014, p. 183-187.Research output: Contribution to journal › Article
TY - JOUR
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
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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U2 - 10.1016/j.electacta.2013.12.128
DO - 10.1016/j.electacta.2013.12.128
M3 - Article
AN - SCOPUS:84892763533
VL - 121
SP - 183
EP - 187
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -