调整LaBO3 (B=Mn,Fe,Co,Ni) 矿氧化物用于耐甲醇氧降解反应电催化剂
Shaikh Parwaiz1, Fazlurrahman Khan2,3,4, James Robert Jennings5
1Chemical Sciences, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410, Brunei Darussalam. mmansoobkhan@yahoo.com.
Physical chemistry chemical physics : PCCP
|September 5, 2025
概括
新的氧化物,包括LaMnO3,有效地减少直接甲醇燃料电池 (DMFC) 中的甲醇交叉. 这些材料还增强了氧降解反应 (ORR),为改善DMFC性能提供了有前途的解决方案.
科学领域:
- 材料科学
- 电化学
- 催化剂
背景情况:
- 甲醇交叉到正极显著阻碍了直接甲醇燃料电池 (DMFC) 的性能,因为它会毒害催化剂.
- 开发耐甲醇电催化剂对于推进DMFC技术至关重要.
研究的目的:
- 合成和描述LaBO3 (B=Mn,Fe,Co,Ni) 矿氧化物作为DMFC的潜在阴极催化剂.
- 评估合成的矿是否能够减轻甲醇交叉并增强氧降解反应 (ORR) 活性.
主要方法:
- 溶凝合成,然后进行化以产生LaBO3氧化物.
- 使用X射线衍射 (XRD),富里埃变换红外光谱 (FTIR) 和X射线光电子光谱 (XPS) 的材料表征.
- 使用线性扫描电量计 (LSV) 进行ORR活性和甲醇耐受性的电化学评估.
主要成果:
- 已经成功合成了纯相LaMnO3,LaFeO3,LaCoO3和LaNiO3矿.
- 由于其小颗粒大小,高孔积和大表面积,LaMnO3表现出优异的ORR催化活性,与Pt/C相比.
- 合成的矿表现出极好的甲醇耐受性,甲醇存在时ORR活性发生最小的负变化.
结论:
- 矿氧化物LaBO3,特别是LaMnO3,是有效的甲醇耐受性ORR电催化剂.
- 这些材料显著提高了直接甲醇燃料电池 (DMFC) 的性能和耐用性.
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