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Updated: Jul 4, 2025

Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
作为二氧化碳清除剂的单原子站点,以允许在PEMFC中使用原始气
Xian Wang1, Xiaolong Yang1, Ying Wang2
1State Key Laboratory of Electroanalytic Chemistry, Jilin Province Key Laboratory of Low Carbon Chemistry Power, Institution Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China.
这项研究引入了一种新的催化剂,将单个原子位点与纳米粒子结合起来,以克服质子交换膜燃料电池 (PEMFC) 中的一氧化碳中毒. 新的催化剂即使在含有CO杂质的情况下也保持性能,使燃料电池技术更加稳健.
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:
- 纳米化 (Pt) 催化剂对于质子交换膜燃料电池 (PEMFC) 阳极至关重要,但对一氧化碳 (CO) 中毒非常敏感.
- 这种敏感性需要使用超纯 (H2),限制了PEMFC的实际应用.
研究的目的:
- 开发一种催化剂,通过将单个原子位点与金属纳米粒子集成,以减轻PEMFC中的CO中毒.
- 为了增强氧化反应 (HOR) 活性和PEMFC催化剂在二氧化碳存在时的耐用性.
主要方法:
- / (Ir/Rh) 单原子位点 (SAS) 与金属纳米粒子 (NP) 的协同集成.
- 在CO污染条件下对H2氧化反应 (HOR) 中催化剂性能进行电化学测试.
- 使用表面增强的拉曼散射光谱学 (SERS) 和计算分析评估和描述单细胞燃料电池性能.
主要成果:
- 新型催化剂在1000ppmCO的存在下表现出不受干扰的HOR活性.
- 与最先进的PtRu/C催化剂相比,达到643 mW cm-2的峰值功率密度,相当于质量活动增加了27倍.
- 与NP相邻的Ir/Rh SAS显示出优异的CO氧化,并提供了反应性OH*物种来清理NP上吸收的CO.
结论:
- 单个原子位点和纳米粒子之间的协同催化提供了一个可行的策略,以征服PEMFC中的CO中毒.
- 这种方法显著提高了催化剂的耐用性和性能,为更强大和更实用的PEMFC应用铺平了道路.
- 这些发现为设计用于清洁能源技术的先进催化剂开辟了新的途径.
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