Mamun Al, García-Mateos Francisco José, Sabantina Lilia, Klöcker Michaela, Diestelhorst Elise, Ruiz-Rosas Ramiro, Rosas Juana María, Rodríguez-Mirasol José, Blachowicz Tomasz, Cordero Tomás
Junior Research Group "Nanomaterials", Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences and Arts, 33619 Bielefeld, Germany.
Department of Chemical Engineering, University of Malaga, Andalucia Tech., Campus de Teatinos, 29010 Málaga, Spain.
Polymers (Basel). 2023 Oct 12;15(20):4064. doi: 10.3390/polym15204064.
In this study, electrospun carbon fiber electrodes were prepared by the carbonization of PAN-FeO electrospun fibers at 800 °C for their use as catalysts in the oxygen reduction reaction in an alkaline electrolyte. Magnetic nanofiber mats were fabricated using a needle-free electrospinning method by incorporating magnetic nanoparticles into a polymer solution. Electrochemical tests revealed that the oxygen reduction reaction (ORR) activity is optimized at an intermediate magnetite loading of 30% wt. These catalysts not only show better performance compared to their counterparts but also achieve high selectivity to water at low potentials. The onset and half-wave potentials of 0.92 and 0.76 V shown by these samples are only slightly behind those of the commercial Pt 20%-carbon black ORR catalyst. The obtained results point out that the electrospinning of PAN-FeO solutions allows the preparation of advanced N-Fe ORR catalysts in fibrillar morphology.
在本研究中，通过在800℃下碳化PAN-FeO电纺纤维制备了电纺碳纤维电极，用作碱性电解质中氧还原反应的催化剂。采用无针电纺方法，将磁性纳米颗粒掺入聚合物溶液中制备了磁性纳米纤维垫。电化学测试表明，在磁铁矿负载量为30%（重量）的中间值时，氧还原反应（ORR）活性得到优化。这些催化剂不仅与其同类催化剂相比表现出更好的性能，而且在低电位下对水具有高选择性。这些样品显示的起始电位和半波电位分别为0.92 V和0.76 V，仅略落后于商业Pt 20%-炭黑ORR催化剂。所得结果表明，PAN-FeO溶液的电纺能够制备出具有纤维状形态的先进N-Fe ORR催化剂。
