Zhang Junjie, Wang Jilong, Fu Yaoming, Peng Xing, Xia Maosong, Peng Weidong, Liang Yaowei, Wei Wuguo
Aerospace Vehicle Power Engineering, Institute of Aeronautical Engineering, Civil Aviation Flight University of China, Tianfu Campus, Chengdu 618000, China.
Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, ON M5S 2E8, Canada.
Molecules. 2025 Apr 14;30(8):1753. doi: 10.3390/molecules30081753.
This study presents a straightforward hydrothermal synthesis approach to fabricate uniform and highly dispersed nanoscale FeO electrocatalysts for the oxygen reduction reaction (ORR). FeSO·7HO is used as the precursor, and sodium dodecyl sulfate (SDS) is incorporated as a dispersing agent to optimize particle size and dispersion. The SDS concentration plays a crucial role in controlling the particle size and distribution, with higher SDS concentrations resulting in smaller, well-dispersed particles (30-40 nm), compared to the agglomerated particles formed without SDS. The FeO catalyst demonstrates significant enhancement in ORR performance, with a half-wave potential of 0.091 V vs. Hg/HgO and a limiting diffusion current density of -5.50 mA cm, surpassing the performance of agglomerated FeO and approaching that of state-of-the-art 20% Pt/C catalysts. Additionally, the FeO catalyst exhibits superior stability and resistance to methanol and CO poisoning, presenting a promising alternative to platinum-based catalysts for ORR applications. This work introduces an efficient approach for the synthesis of high-performance and evenly distributed FeO electrocatalysts, offering a new pathway for the development of metal oxide-based ORR catalysts with enhanced activity and durability.
本研究提出了一种简单的水热合成方法，用于制备用于氧还原反应（ORR）的均匀且高度分散的纳米级FeO电催化剂。以FeSO·7HO作为前驱体，并引入十二烷基硫酸钠（SDS）作为分散剂，以优化粒径和分散性。SDS浓度在控制粒径和分布方面起着关键作用，与未添加SDS时形成的团聚颗粒相比，较高的SDS浓度会产生更小、分散良好的颗粒（30-40纳米）。FeO催化剂在ORR性能方面表现出显著增强，相对于Hg/HgO的半波电位为0.091 V，极限扩散电流密度为-5.50 mA cm，超过了团聚态FeO的性能，接近最先进的20% Pt/C催化剂的性能。此外，FeO催化剂表现出优异的稳定性以及对甲醇和CO中毒的抗性，为ORR应用提供了一种有前景的替代铂基催化剂的选择。这项工作介绍了一种合成高性能且分布均匀的FeO电催化剂的有效方法，为开发具有更高活性和耐久性的金属氧化物基ORR催化剂开辟了一条新途径。
