无溶解的共价有机聚合物通过共价移植策略有效地驱动质子交换膜燃料电池
Xueli Li1, Jingkui Hou1, Yiming Leng1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|June 9, 2025
概括
聚合有机聚合物 (COP) 在氧降解反应 (ORR) 中表现有前途. 一种新的共价接种方法提高了导电性和主动站点访问,提高了燃料电池的ORR性能.
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:
- 性有机聚合物 (COP) 是有前途的氧降解反应 (ORR) 催化剂,但具有低导电性和不良的活性部位可访问性.
- 现有的复合材料 (例如,COP-碳) 由于堆叠和弱接口而存在局限性,阻碍了电子和质量传输.
研究的目的:
- 开发一种新的共价接种策略,用于制造具有增强导电性和主动站点可访问性的板状COP网络 (COP@G).
- 评估COP@G作为ORR催化剂在酸性介质和质子交换膜燃料电池 (PEMFC) 中的性能.
主要方法:
- 用芳香原氨基基组对COP进行边缘功能化.
- 石墨烯分散物的二化和共价附着形成了COP@G混合物.
- 在0.1M HClO4中对ORR活性进行电化学表征,并集成到PEMFC阴极中.
主要成果:
- 与原始COP相比,COP@G混合体的电导率增加了十倍.
- 在酸性ORR中实现了创纪录的801mV半波潜力,超过了范德瓦尔斯组装的COP-G194mV.
- 与传统的COP-碳复合材料相比,PEMFC阴极功率密度显示出一个数量级的增强.
结论:
- 联接种是一种有效的策略,可以克服ORR催化COP的局限性.
- COP@G在酸性ORR和PEMFC应用中表现出卓越的性能,突出了其对下一代能源设备的潜力.
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