缺陷工程三元金属旋转型Ni-Fe-Co氧化物作为整体电化学水分裂的双功能电催化剂
Sebastian Cyril Jesudass1, Subramani Surendran2, Dae Jun Moon3
1Department of Materials Science & Engineering, Chonnam National University, Gwangju 61186, Republic of Korea.
Journal of colloid and interface science
|March 1, 2024
概括
使用离子对Ni-Fe-Co螺旋氧化物的缺陷工程提高了它们作为水分裂的双功能电催化剂的性能,这对于绿色生产至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 过渡金属spinel氧化物是水分裂的有希望的双功能电催化剂.
- 开发高效和稳定的电催化剂是绿色生产的关键.
- 缺陷工程提供了一种提高催化剂活性和导电性的策略.
研究的目的:
- 使用缺陷工程策略设计三元金属Ni-Fe-Co螺旋氧化物.
- 研究Na+离子度对结构和电催化活性的影响.
- 为了评估这些催化剂的水分裂性能.
主要方法:
- 通过缺陷工程合成具有不同Na+离子含量 (NFCO-Na和NFCO) 的Ni-Fe-Co螺旋氧化物.
- 结晶结构,晶格扩张和缺陷形成的表征.
- 电化学评估氧进化反应 (OER) 和进化反应 (HER) 的活性.
主要成果:
- NFCO-Na (富含Na) 螺旋氧化物表现出晶格扩张和有缺陷的晶体结构,活性位点增加.
- NFCO-Na在10 mA cm-2.2时显示较低的OER (248 mV) 和HER (153 mV) 超电位.
- NFCO-Na显示出较小的Tafel斜率 (OER为78mV,HER为129mV) 和低电池电压为1.67V,电压为10mAcm-2.2.
结论:
- 三元金属氧化物的缺陷工程显著增强了水分裂的电化学活性.
- NFCO-Na催化剂表现出卓越的双功能活性和稳定性.
- 这种方法为开发高效绿色生产的先进电催化剂提供了一条途径.
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