矿CoSn(OH) 6纳米立方体与调整的d频段状态向增强的氧气进化反应
Mingwei Sun1,2, Baopeng Yang3, Jiaxing Yan2
1Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, P. R. China. morong@xtu.edu.cn.
Nanoscale
|May 20, 2024
概括
铁兴奋剂增强了铁氧化矿对氧演化反应 (OER) 的性能. 这一策略优化了电子结构,改善了催化活性,并减少了对高效的开放式资源应用的能源障碍.
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:
- 氧化 (CoSn(OH) 矿是一种稳定且具有成本效益的氧化演化反应 (OER) 的电催化剂.
- 它的催化活性受到不足的活性位点的限制,阻碍了高效的OER性能.
研究的目的:
- 为了增强COSn(OH) 6矿氧化物氧化演化反应 (OER) 的活性.
- 通过Fe3+兴奋剂优化CoSn (OH) 6的电子结构和活性位点.
主要方法:
- 通过一种简单的热水方法合成Fe3+配合的CoSn(OH) 6纳米立方体.
- 结构描述以确认Fe3+的结合.
- 电化学测试用于评估OER性能.
- 在现场进行拉曼光谱,以评估催化剂的稳定性.
- 密度函数理论 (DFT) 计算用于研究电子结构和反应机制.
主要成果:
- 铁3+离子成功地被纳入了CoSnOH6晶体结构.
- CoSn(OH) 6-Fe1.8%在10 mA cm-2时表现出低OER超电位的289 mV.
- 催化剂在OER期间表现出极好的稳定性,没有观察到显著的结构重建.
- DFT计算显示,Fe3+兴奋剂会转移d频段中心,增强中间吸附并减少OER的速度决定性吉布斯自由能量.
结论:
- 3+兴奋剂是一种有效的策略,可以改善CoSn (OH) 氧化的OER活性.
- 性能提升归因于优化的电子结构和改善了OER中间体的吸附.
- 这项研究为设计用于高效能源转换应用的先进氧化电催化剂提供了宝贵的见解.
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