ZIF67-ZIF8@MFC-Derived Co-Zn/NC 相互连接的框架与硫酸聚合物结合,作为氧气还原反应的高效和稳定的复合电催化剂
Hongjie Meng1, Jingnan Song1, Yongming Zhang1
1School of Chemistry and Chemical Engineering, Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai 200240, China.
Polymers
|February 24, 2024
概括
使用-和添加碳 (Co-Zn/NC) 的无贵金属催化剂显示出出色的氧降解反应 (ORR) 活性和耐久性,在性介质中表现优于/碳.
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:
- 无贵金属的催化剂对于具有成本效益的燃料电池至关重要.
- 氧减少反应 (ORR) 是燃料电池中的一个关键过程.
研究的目的:
- 为ORR设计和合成新的非贵金属催化剂.
- 评估合成材料的催化活性和耐用性.
主要方法:
- 用纳米微纤维纤维素 (MFC) 在现场生长的焦化物模酸框架 (ZIF67和ZIF8).
- 复合材料的 Pyrolysis 形成 Co-Zn/NC 相互连接的框架.
- 用高硫酸聚合物制备一个Co-Zn/NC复合催化剂.
主要成果:
- Co-Zn/NC催化剂显示出高的ORR活性 (E0=0.974V与RHE,E1/2=0.858V与RHE).
- 在性介质中在10000s后获得了优异的长期耐用性,90%的电流保留.
- 在性介质中表现优于商业Pt/C催化剂.
结论:
- 层次性的多孔结构,均的Co纳米粒子和兴奋剂增强了电催化性能.
- 相互连接的框架和石墨碳确保了催化剂的稳定性.
- Co-Zn/NC复合物显示出性和酸性介质应用的潜力.
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