WO3 -辅助协同效应催化了PEMFCs的高效和耐碳氧化氧化
Han Tian1, Xu Yu1,2, Weimin Huang1
1State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 21, 2023
概括
一种新的氧化 (Pd-WO3) 催化剂显示出高活性和对质子交换膜燃料电池 (PEMFCs) 的CO耐受性. 这种催化剂能够从二氧化碳污染中快速恢复,性能优于传统的催化剂.
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) 需要高效的阳极催化剂来进行氧化反应 (HOR).
- 由于催化剂活性和对燃料中一氧化碳 (CO) 杂质的耐受性,PEMFCs的商业应用受到阻碍.
- 开发耐碳排放的阳极催化剂对于推进燃料电池技术至关重要.
研究的目的:
- 为了制造和描述PEMFCs的新型CO耐受性阳极催化剂.
- 为了研究新催化剂的增强氧化反应 (HOR) 活性和CO耐受性.
- 阐明负责提高性能的协同催化机制.
主要方法:
- 在氧化物 (Pd-WO3/C) 上加载的纳米颗粒的制造,通过浸泡降解路径.
- 催化剂的HOR活性和PEMFC中的CO容忍度的电化学表征.
- 使用先进技术分析界面电子相互作用和催化机制.
主要成果:
- 优化的3Pd-WO3/C催化剂在80°C时实现了1.33W cm−2的高功率密度.
- 催化剂表现出了显著的CO耐受性,在CO暴露后,功率密度快速恢复.
- 在CO的存在下,Pt/C和Pd/C催化剂的性能出现了不可逆转的退化.
- 增强的HOR活性归因于电子界面相互作用和溢出效应.
- 提出了一种涉及Pd和WO3的新型协同机制,用于CO电氧化和活性部位再生.
结论:
- 开发的Pd-WO3/C催化剂为PEMFCs提供了卓越的HOR活性和出色的CO耐受性.
- 催化剂的性能与独特的接口电子特性和协同的催化机制有关.
- 这一进步通过解决CO中毒问题,为PEMFCs的商业可行性带来了重大潜力.
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