Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure
Abstract
:1. Introduction
2. Materials and Methods
2.1. Fabrications of NiCo2O4/GF and Ni1−xCuxCo2O4/GF Electrodes
2.2. Evaluation of Physicochemical Properties of Electrodes
2.3. Electrochemical Characterizations of Electrodes
3. Results and Discussion
3.1. Physicochemical Properties of Ni1−xCuxCo2O4 Electrode Active Materials Grown on GF
3.2. Electrochemical Properties of Ni1−xCuxCo2O4 Electrode Active Materials Grown on GF
3.3. Evaluation of the Durability of the Electrode
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Atomic (%) | Ni | Cu | Co | O | C | |
---|---|---|---|---|---|---|
Sample | ||||||
Graphite Felt | - | - | - | 10.49 | 89.51 | |
NiCo2O4/GF | 7.46 | - | 14.88 | 29.82 | 47.84 | |
Ni0.875Cu0.125Co2O4/GF | 6.70 | 0.98 | 15.40 | 31.00 | 45.92 | |
Ni0.75Cu0.25Co2O4/GF | 5.51 | 1.70 | 14.98 | 32.11 | 45.70 | |
Ni0.625Cu0.375Co2O4/GF | 4.59 | 2.74 | 14.62 | 29.27 | 48.78 | |
NiCuCo2O4/GF | 3.93 | 3.52 | 14.83 | 29.64 | 48.08 |
Sample | Support | Overpotential (j = 10 mA cm−2) | Tafel Slope (mV dec−1) | Ref. |
---|---|---|---|---|
Ni0.75Cu0.25Co2O4 | Graphite Felt | 509 mV | 119 | This work |
Co-P | Graphite Felt | 530 mV (j = 5 mA cm−2) | 133 | [41] |
CuS/CuFeS2 | Carbon Felt | 400 mV | 171 | [42] |
NiCu(I) | Ni foam | 252 mV | 54 | [43] |
NiFe2O4 | Ni plate | 520 mV | 223 | [44] |
CuFe2O4 | Ni plate | 540 mV | 238 | [44] |
Fe-Co(OH)2 | Glassy Carbon | 290 mV | 69 | [45] |
NiCo2S4/RGO | Glassy Carbon | 366 mV | 65 | [46] |
NiCo2O4/CoNx-NMC NMC (Nitrogen doped Mesoporous Carbon) | Glassy Carbon | 370 mV | 99 | [47] |
(Co0.21Ni0.25Cu0.54)3Se2 | Glassy Carbon | 241 mV | 53 | [48] |
FeCoNi alloy | N-doped graphene | 288 mV | 57 | [49] |
RuO2 | Glassy Carbon | 300 mV | 54 | [49] |
IrO2 | Glassy Carbon | 314 mV | - | [50] |
Sample | Graphite Felt | NiCo2O4 | Ni0.875Cu0.125Co2O4 | Ni0.75Cu0.25Co2O4 | Ni0.625Cu0.375Co2O4 | Ni0.5Cu0.5Co2O4 | |
---|---|---|---|---|---|---|---|
Factor | |||||||
RS (Ω) (Solution Resistance) | 2.960 | 2.768 | 2.627 | 2.654 | 2.613 | 3.012 | |
Rct (Ω) (Charge Transfer Resistance) | 10.39 | 1.814 | 1.250 | 0.728 | 1.613 | 1.631 | |
Total resistance (Ω) | 13.35 | 4.582 | 3.877 | 3.382 | 4.226 | 4.643 |
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Park, H.; Park, B.H.; Choi, J.; Kim, S.; Kim, T.; Youn, Y.-S.; Son, N.; Kim, J.H.; Kang, M. Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure. Nanomaterials 2020, 10, 1727. https://doi.org/10.3390/nano10091727
Park H, Park BH, Choi J, Kim S, Kim T, Youn Y-S, Son N, Kim JH, Kang M. Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure. Nanomaterials. 2020; 10(9):1727. https://doi.org/10.3390/nano10091727
Chicago/Turabian StylePark, Hyerim, Byung Hyun Park, Jaeyoung Choi, Seyeon Kim, Taesung Kim, Young-Sang Youn, Namgyu Son, Jae Hong Kim, and Misook Kang. 2020. "Enhanced Electrochemical Properties and OER Performances by Cu Substitution in NiCo2O4 Spinel Structure" Nanomaterials 10, no. 9: 1727. https://doi.org/10.3390/nano10091727