单原子使高性能质子陶燃料电池的逆溢出成为可能
Sunce Zhao1, Wenjia Ma1, Beibei He1,2
1Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.
Advanced materials (Deerfield Beach, Fla.)
|February 24, 2025
概括
研究人员在矿材料上开发了一种新型的单原子催化剂,用于质子陶燃料电池 (PCFC). 这一进步提高了氧气减氧反应动力学和耐用性,提高了PCFC的性能,以实现可持续能源.
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
- 可持续能源 可持续能源
背景情况:
- 质子陶燃料电池 (PCFCs) 对可持续能源具有前景,但面临着缓慢的氧气减少动力学和阴极材料耐用性的挑战.
- 与质子有关的氧减少反应 (P-ORR) 是PCFC性能的一个关键瓶.
研究的目的:
- 为PCFC开发一种新的阴极材料,以克服P-ORR动力学和耐久性的局限性.
- 为了研究在矿材料上固定的单原子的有效性,以提高PCFC的性能.
主要方法:
- 在BaCe0.125Fe0.875O3-δ (BCF) 矿上合成一种新的单原子Ru,采用一种简单且可扩展的固态方法.
- 理论和实验分析以描述单原子Ru的BCF结构及其催化活性.
- 使用优化的2Ru-BCF阴极制造和测试单个PCFC电池.
主要成果:
- 在BCF上的单原子Ru表现出独特的4坐标Ru-O-Fe配置,诱导反向溢出,并作为P-ORR的活性部位.
- 优化的2Ru-BCF阴极在单个PCFC中在700°C时达到1.78W cm-2的峰值功率密度.
- 2Ru-BCF阴极在200多小时内表现出卓越的运行稳定性.
结论:
- 对矿材料的单原子工程是一种有效的策略,可以提高PCFC中的P-ORR动力学和耐久性.
- 开发的Ru-anchored BCF阴极显著提高了PCFC技术的商业可行性.
- 这项研究为有效的电化学能量转换提供了对催化剂设计的新见解.
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