| Autor: |
Hu, Xiabing, Wang, Haoye, Qi, Songya, Su, Zilong, Wang, Jiajun, Chen, Kaixuan, Li, Shuji, Huang, Xuan, Luo, Shiping, Xie, Aijuan |
| Zdroj: |
Ionics; Feb2022, Vol. 28 Issue 2, p813-821, 9p |
| Abstrakt: |
The precursor of Co metal organic framework (MOF) was first synthesized by hydrothermal method; then, the optimal Co-MOF was pyrolyzed in a nitrogen atmosphere to obtain the derivative (Co/C). The as-prepared materials were finally applied to water splitting to investigate their oxygen evolution reaction (OER) performance. A series of electrochemical tests such as linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) show that Co/C (700 °C) exhibits lowest overpotential (420 mV) and charge transfer resistance (Rct = 5.25 Ω), smallest Tafel slope (119 mV dec−1) as compared to other relevant materials. After the cyclic life test of 10,000 s, the current density of Co/C (700 °C) remained at 94.88%. In addition, the comparison of the OER performance between Co/C (700 °C) with other reported cobalt-based materials illustrates that Co/C (700 °C) has lower overpotential, and its Tafel slope is also comparable with these reported cobalt-based materials. Therefore, Co/C (700 °C) has broad application prospect in oxygen-evolution reaction. Scheme 1 Fabrication Co/C derived from Co-MOF and brief schematic of OER. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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