层次性多孔空洞氧化碳支持的Pt合金催化剂,具有可控制的三聚接口,用于甲醇电氧化
Tong Wang1, Yunqi Yu1, Xun Jiang1
1School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China.
ACS applied materials & interfaces
|January 3, 2025
概括
一种新的催化剂PtCoFe-CoFeO@N-HHCS显著提高了直接甲醇燃料电池的性能. 与商业选项相比,这种催化剂提供了更高的活性和稳定性,为低负载催化剂铺平了道路.
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:
- 直接甲醇燃料电池 (DMFC) 是一个有前途的能量转换装置.
- 基催化剂对DMFCs至关重要,但面临着高成本和CO中毒等挑战.
- 开发高效和稳定的催化剂对于推进DMFC技术至关重要.
研究的目的:
- 为了合成一种新的层次性多孔空心酸碳受限三接口催化剂 (PtCoFe-CoFeO@N-HHCS).
- 评估新材料在DMFC中甲醇氧化的催化性能.
- 为了阐明结构-活动关系,控制催化剂的增强性能.
主要方法:
- 序列溶液聚合和一个CoFe2O4@polymer@ZIF-67核心的现场生长.
- 高温诱导的相位迁移和现场化学替代催化剂制备.
- 电化学测试,包括循环电压测量和时测量,以评估甲醇氧化活性和CO剥离.
主要成果:
- 该PtCoFe-CoFeO@N-HHCS催化剂的质量活性分别是商业Pt/C和PtRu/C的4.1倍和2.1倍.
- 与商业Pt/C相比,CO电氧化峰值电位转移负70mV,表明CO耐受性得到改善.
- 催化剂表现出增强的稳定性,这是由于添加的碳层防止了Pt溶解.
结论:
- PtCoFe-CoFeO@N-HHCS催化剂显示出优越的甲醇氧化性能,这是由于其独特的三接口,层次性的多孔结构和配合的碳外.
- 组件之间的协同效应增强了电子传输,质量传输和催化剂稳定性.
- 这项工作为DMFCs开发高活性,稳定和低负载的催化剂提出了有前途的战略.
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