原子分散FeN2 P2 基因具有高活性和稳定性,用于整个pH范围内的氧减少反应
Wendan Xue1,2, Qixing Zhou1, Xun Cui2
1Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Nankai University, Tianjin, 300071, P. R. China.
Angewandte Chemie (International ed. in English)
|June 22, 2023
概括
本研究引入了一种新的基于铁的单原子催化剂 (Fe-SA/PNC),用于氧降解反应 (ORR). 催化剂在所有pH水平上表现出极好的活性和稳定性,性能优于基催化剂.
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
- 纳米技术 纳米技术
背景情况:
- 基于铁的单原子电催化对氧降解反应 (ORR) 有希望.
- 提高酸性电解质的催化剂活性和稳定性仍然是一个重大挑战.
研究的目的:
- 为ORR开发一种高活性和稳定的基于Fe的单原子催化剂.
- 为了研究对催化剂性能的原子层次见解.
主要方法:
- 简单的化学蒸汽沉积策略.
- 铁原子与和在一个层次的碳框架中的协调.
- 密度函数理论 (DFT) 计算用于验证.
主要成果:
- 高密度Fe原子 (3.97重量%) 与N和P原子协调.
- 通过性,中性和酸性电解质 (分别为0.92 V,0.83 V,0.86 V和RHE) 显著的ORR活性.
- 在KOH和H2SO4中经过3万个循环后,没有性能衰变的特殊耐用性,HClO4的轻微变化,性能优于商业Pt/C.
结论:
- 开发的Fe-SA/PNC催化剂为ORR提供了卓越的活性和稳定性.
- 这项工作为设计先进的非贵金属单原子电催化剂提供了途径.
- 了解原子水平对于提高电催化剂性能至关重要.
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