在N,S-编码的碳上构建FeS和ZnS异质连接,作为强大的电催化剂,用于氧降低反应
Fenglai Pei1, Min Li2, Yifan Huang2
1Shanghai Motor Vehicle Inspection Certification & Tech Innovation Center Co., Ltd., Jiading District, Shanghai 201805, China.
Nanomaterials (Basel, Switzerland)
|October 14, 2023
概括
一种新型的Fe/ZnS-SNC电催化剂与FeS和ZnS异质连接证明了优越的氧降解反应 (ORR) 性能. 这一进步对于高效的可再生能源转换设备至关重要.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 开发高效的氧降解反应 (ORR) 电催化剂对于推进可再生能源技术至关重要.
- 与基催化剂相比,具有成本效益和高度活性的替代品对燃料电池和金属空气电池有很高的需求.
研究的目的:
- 合成和描述一种新的纳米复合材料电催化剂Fe/ZnS-SNC,用于氧降解反应 (ORR).
- 评估Fe/ZnS-SNC催化剂在性和酸性介质中的电催化活性和稳定性.
- 评估催化剂在灵活的Zn-空气电池和燃料电池等实际能量转换装置中的性能.
主要方法:
- 制造Fe/ZnS-SNC纳米复合材料通过单步硫化Zn-和Fe-有机框架.
- 材料结构和组成的表征,重点是FeS/ZnS异质连接.
- 催化剂对ORR活性进行电化学测试,包括循环电压测量和旋转盘电极测量.
- 使用合成催化剂组装和测试柔性Zn-空气电池和H2-O2/H2-空气燃料电池.
主要成果:
- 优化的Fe/ZnS-SNC900催化剂表现出极好的ORR活性,半波电位为0.94V (性) 和0.81V (酸性),超过商业Pt/C.
- FeS/ZnS异质连接促进了高效的电子转移,提高了催化性能.
- 灵活的Zn-空气电池表现出高的开放电路电压 (1.45V) 和功率密度 (30.2 mW cm−2).
- 配备Fe/ZnS-SNC900的燃料电池实现了388.3 mW cm−2 (H2-O2) 和242.8 mW cm−2 (H2-空气) 的优越功率输出.
结论:
- Fe/ZnS-SNC纳米复合物代表了氧减氧反应的高度活跃和成本效益高的电催化剂.
- 异构结构的设计有效地促进了电子转移,从而提高了催化性能.
- 这项工作为开发高效可再生能源转换设备的先进电催化剂提供了有希望的途径.
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