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异原子杂的缺陷定纳米-Pt为高稳定性和低湿度的质子交换膜燃料电池

Weikang Zhu^1,2, Yuankai Shao^1,2, Bingjie Zhou^1,2

¹National Engineering Laboratory for Mobile Source Emission Control Technology, China Automotive Technology & Research Center Co., Ltd, Tianjin, 300300, China.

Small (Weinheim an der Bergstrasse, Germany)

|August 20, 2024

概括

一种新的ZIF衍生的碳材料增强了质子交换膜燃料电池 (PEMFC) 中氧降解反应的纳米-Pt催化剂. 这种优化的催化剂显示出高活性和耐用性,即使没有加湿,推进燃料电池技术.

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:

质子交换膜燃料电池 (PEMFC) 需要高效和稳定的氧降解反应 (ORR) 催化剂.
目前的催化剂在苛刻的条件下经常面临成本,稳定性和性能方面的挑战.

研究的目的:

为基于纳米 (Pt) 的ORR催化剂开发一种先进的支材料.
优化催化剂结构,以提高PEMFC中的相互作用,活性和耐久性.

主要方法:

合成一种以异质原子和缺陷为剂的氧化伊米达酸框架 (ZIF) 衍生碳材料.
使用物理化学方法对材料的结构和性能进行表征.
评估PEMFC中的催化剂性能,包括活性,稳定性和耐久性测试.
理论模拟以了解催化剂的定机制.

主要成果:

由ZIF衍生的碳材料有效地支持纳米-Pt,增强了Pt-支持相互作用和ORR固有的活性.
催化剂在没有阴极加湿的情况下在H2 - O2下显示出高质量活性 (0.475 A mg_Pt-1).
观察到优异的电化学稳定性,在20,000个循环后,最大功率密度只有7.4%的衰减.

结论:

在ZIF衍生的碳材料中,异原子合的缺陷在定纳米-Pt中起着至关重要的作用,改善了催化剂性能.
开发的催化剂由于其高活性和耐用性,对实际PEMFC应用具有显著的潜力.
这项工作为设计燃料电池下一代ORR催化剂提供了宝贵的见解.

关键词:

在PEMFC中,PEMFC是最重要的.在 Pt 纳米粒子中.在 ZIF ZIF 中.定效应是一种定效应.氧降解反应是氧降解反应.

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