在纳米颗粒和"混合价值"铁和氧化物上增强了酸电氧化
Bilquis Ali Al-Qodami1,2, Sayed Youssef Sayed1, Hafsa H Alalawy1
1Chemistry Department, Faculty of Science, Cairo University Cairo 12613 Egypt ammohammad@cu.edu.eg sysayed@sci.cu.edu.eg.
RSC advances
|July 13, 2023
概括
用和铁氧化物修改的纳米粒子增强了酸电氧化. 这种新型催化剂提高了反应动力学和稳定性,为燃料电池应用提供了一个有前途的替代方案.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 酸电氧化 (FAO) 对燃料电池至关重要.
- 催化剂是有效的,但容易中毒.
- 开发强大的和高效的催化剂是必不可少的.
研究的目的:
- 用氧化 (纳米-NiO) 和氧化铁 (纳米-FeO) 的纳米结构来修改纳米粒子 (纳米-Pt).
- 引导粮农组织机制向脱和提高催化剂性能.
- 研究沉积序列和激活对催化剂性能的影响.
主要方法:
- 纳米-Pt在玻璃碳 (GC) 基板上的电化学组装.
- 通过纳米-NiO和纳米-FeO进行混合改造.
- 在NaOH中对催化剂 (a-FeO/NiO/Pt/GC) 的后激活.
- 纳米粒子的形态特征.
- 对粮农组织的电催化性能评估.
主要成果:
- 与原始Pt/GC相比,a-FeO/NiO/Pt/GC催化剂的催化效率增加了12.5倍.
- 改善了对中毒的催化耐受性 (高达5倍) 和-214 mV的发病潜力的转移.
- 在经过测试的催化剂中表现出最小的电荷转移阻力和最高的稳定性.
- 优化的沉积序列和激活是性能的关键.
结论:
- 使用廉价的FeO和NiO氧化物进行混合改造有效地增强了FAO.
- 该a-FeO/NiO/Pt/GC催化剂提供了卓越的动力学,稳定性和耐毒性.
- 这种方法为开发用于酸燃料电池的先进电催化剂提供了有希望的途径.
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