与结合的Fe,P异核催化对调节了超稳定的氧气去极化阴极的氧降解反应动力学
Fenghong Lu1,2, Yuanyuan Zhang1,3, Lingbo Zong1,3
1State Key Laboratory of Eco-chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
原子分散的Fe,P在等级多孔碳上的异核催化剂显著提高了氧降解反应 (ORR) 的性能. 这些先进的催化剂可以在水性Zn-空气电池和-过程中保持耐用和高效的运行.
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:
- 有效的氧降解反应 (ORR) 催化剂对于推进氧去极化阴极技术至关重要.
- 在催化剂设计中最大限度地利用原子对于成本效益和性能至关重要.
- 现有的催化剂在实际应用中经常面临稳定性和效率方面的挑战.
研究的目的:
- 为了合理设计和合成新型原子分散的Fe,P在层次性多孔碳 (Fe,P/HPC) 上的异核催化对.
- 研究Fe,P/HPC在氧降解反应中的催化机制和性能.
- 评估Fe,P/HPC在水性Zn-空气电池,准固态Zn-空气电池和-过程中的应用潜力.
主要方法:
- 在层次性多孔碳上合成原子分散的Fe,P异核催化对.
- 在性和酸性介质中ORR性能的电化学表征.
- 在水性Zn-空气电池,准固态Zn-空气电池和-电解剂中组装和测试Fe,P/HPC.
主要成果:
- Fe,P/HPC表现出优异的性ORR性能,半波电位 (E1/2) 为0.92V,具有显著的稳定性 (>150h).
- 在酸性介质中,Fe,P/HPC达到0.74V的E1/2.
- 基于Fe,P/HPC的水性Zn-空气电池表现出高功率密度 (262 mW cm-2) 和长期稳定性 (>2800 h);准固态Zn-空气电池显示出高开路电压 (1.52 V) 和稳定的循环.
- 在Fe,P/HPC水泥RuO2电解仪实现了高电流密度 (300 mA cm-2在1.66 V),在-过程中稳定超过110小时.
结论:
- 在层次性多孔碳上原子分散的Fe,P异核催化对是非常有效的ORR催化剂.
- 铁,P对和中间体之间的键相互作用增强了动力学并降低了激活障碍.
- Fe,P/HPC在储能和转换技术中显示出实用和持久应用的巨大潜力.
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