作为离子交换膜燃料电池中氧降解反应催化剂的Co (II) - 化聚胺
Yu-Chang Huang1, Yen-Zen Wang2, Tar-Hwa Hsieh1
1Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology, 415, Chien-Kuo Road, Kaohsiung 80782, Taiwan.
Membranes
|September 27, 2023
概括
一种新型的--碳 (Co-N-C) 电催化剂,由-化聚纳甲 imine衍生,显示出对离子交换膜燃料电池 (AEMFC) 的有前途的性能. 这种Co-N-C催化剂表现出优异的氧降解反应活性和稳定性,与基催化剂相美.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 阳离子交换膜燃料电池 (AEMFC) 是传统质子交换膜燃料电池的一个有希望的替代品.
- 开发高效和成本效益的阴极催化剂用于氧降解反应 (ORR) 对于AEMFC的性能至关重要.
- 基催化剂有效但昂贵,推动了对替代材料的研究.
研究的目的:
- 为ORR合成和描述一种新的--碳 (Co-N-C) 电催化剂.
- 评估Co-N-C催化剂作为AEMFC中的阴极催化剂的性能.
- 为了比较Co-N-C催化剂的活性,稳定性和功率密度与商业催化剂.
主要方法:
- 合成了基化聚纳胺胺 (Co-PNIM),然后化以产生Co-N-C电催化剂.
- 用X射线衍射 (XRD) 和高分辨率传输电子显微镜 (HR-TEM) 来进行结构特征.
- 通过循环电量计 (CV) 和单细胞燃料电池测试来评估电化学性能.
主要成果:
- 烧焦的Co-N-C材料呈现出明显的C002和C111平面,表明催化剂结构的成功形成.
- 该Co-N-C催化剂在0.8V时显示出显著的ORR峰值,其有限的减少电流密度为5.46 mA cm-2,与商业Pt/C (5.26 mA cm-2) 相比.
- 使用Co-N-C的AEMFC实现了243mW cm-2的最大功率密度,具有卓越的稳定性 (7.9%的衰变与10,000个循环后Pt/C的22.7%相比).
结论:
- 合成的Co-N-C电催化剂是AEMFCs中ORR的金可行的替代品.
- 催化剂具有高ORR活性,优异的电化学稳定性和良好的功率密度.
- 对优化Co-N-C催化剂的进一步研究可能会导致更实惠,更高效的燃料电池技术.
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