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基基催化剂的自化使固体氧化物燃料电池在液体燃料上有效运行

Kang Xu¹, Hua Zhang¹, Wanqing Deng¹

¹School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.

Science bulletin

|September 20, 2023

概括

研究人员开发了一种基于的新型催化剂,可以显著提高运行在液体燃料的固体氧化物燃料电池 (SOFC) 的焦化耐受性. 这一突破提高了液体燃料应用的SOFC性能和寿命.

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:

使用液态碳化合物燃料的固体氧化物燃料电池 (SOFC) 的商业化受到阳极焦化的限制.
通过局部蒸汽/碳比率调节来提高阳极焦化容忍是有效的,但很困难.

研究的目的:

设计一种基于基的催化剂,具有增强的焦化耐受性和活性,用于在SOFC中直接利用液体燃料.
调查催化剂的结构转变和焦炭去除机制.

主要方法:

基于的催化剂 (Ce0.95Ru0.05O2-δ,CR5O) 的合理设计和合成.
在现场表征以确认催化剂转化为Ru/Ce0.95Ru0.05-xO2-δ (Ru/CR5-xO).
使用液体燃料 (甲醇) 在750°C的SOFC性能测试.
密度函数理论 (DFT) 计算以阐明催化机制.

主要成果:

该CR5O催化剂转化为Ru/CR5-xO,表现出优异的自化,用于焦炭去除.
使用Ru/CR5-xO涂层Ni-YSZ阳极的SOFC实现了1.010W cm−2.2的峰值功率密度.
使用甲醇在750°C下,经过200小时的稳定运行而没有焦化,证明了这一点.
DFT的计算表明,减少了能量障碍和COH中间体的形成,从而提高了活性和焦化耐受性.

结论:

合理设计的Ru/CR5-xO催化剂表现出卓越的焦化容忍度和在SOFC中直接利用液体燃料的活性.
催化剂的自我水能力和DFT计算所阐明的机制是其性能的关键.
这一发展为推进液体燃料应用的SOFC技术提供了一个有前途的解决方案.

关键词:

阳极是一种极.碳的去除碳的去除催化剂催化剂是一种催化剂.液体燃料是一种液体燃料.纳米颗粒纳米颗粒

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