一种铁和兰坦化异金属协调聚合物衍生电催化剂,显示出增强的活性和稳定性,用于减少氧的反应
Xin Liu1, Peng-Peng Guo1, Kun-Zu Yang1
1Key Lab for Advanced Materials, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, P. R. China. liujingang@ecust.edu.cn.
这项研究引入了一种新的铁和联合的电催化剂 (FeLaNC),用于清洁能源应用. 与相比,FeLaNC催化剂表现出优越的氧降解反应活性和稳定性,使其成为空气电池的理想选择.
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:
- 开发无贵金属电催化剂对于高效的清洁能源转换设备至关重要.
- 氧降解反应 (ORR) 是燃料电池和金属空气电池的一个关键过程.
- 铁--碳 (Fe-N-C) 材料是有前途的ORR电催化剂,但通常需要进一步优化活性和稳定性.
研究的目的:
- 为了合成和表征一种新的Fe,La联合化Fe-N-C电催化剂 (FeLaNC).
- 为了评估FeLaNC催化剂的ORR性能和稳定性.
- 评估FeLaNC作为空气电池 (ZAB) 中阴极催化剂的性能.
主要方法:
- 合成一种异金属协调聚合物,使用1.1'-铁碳酸和盐.
- 将聚合物加载到碳化ZIF-8和随后的热解中,以获得FeLaNC电催化剂.
- 在0.1M KOH中对ORR活性和稳定性的电化学表征,并在ZAB中进行测试.
主要成果:
- 与FeNC (0.864 V) 和商业Pt/C (0.862 V) 相比,FeLaNC催化剂对ORR显示出更高的半波潜力 (0.874 V).
- FeLaNC表现出极好的稳定性,在10,000个潜在周期后的衰变是可以忽略不计的.
- 基于FeLaNC的ZAB实现了比基于Pt/C的ZAB更高的开放电路电压 (1.46 V) 和功率密度 (130 mW cm−2).
结论:
- 兰兴奋剂通过调节电子密度和减轻激素损伤来增强Fe-N-C电催化剂的ORR活性和稳定性.
- FeLaNC催化剂为能量转换装置中的电催化剂提供了一种高性能,稳定且无贵金属的替代方案.
- 这项工作为设计用于清洁能源应用的先进电催化剂提供了有效的策略.
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