Marinoiu Adriana, Ion-Ebrasu Daniela, Soare Amalia, Raceanu Mircea
National Institute for Cryogenics and Isotopic Technologies ICSI-Rm, Valcea, ICSI Energy, Uzinei Street, No. 4, 240050 Ramnicu Valcea, Romania.
Materials (Basel). 2022 Sep 5;15(17):6174. doi: 10.3390/ma15176174.
Iodine-doped graphene oxide is attracting great attention as fuel cell (FC) electrocatalysts with a high activity for the oxygen reduction reaction (ORR). However, most of the reported preparation techniques for iodine-doped graphene (I/rGO) could be transposed into practice as multiple step procedures, a significant disadvantage for scale-up applications. Herein, we describe an effective, eco-friendly, and fast technique for synthesis by a microwave-tuned one-stage technique. Structural and morphological characterizations evidenced the obtaining of nanocomposite sheets, with iodine bonded in the graphene matrix. The ORR performance of I/rGO was electrochemically investigated and the enhancement of the cathodic peak was noted. Based on the noteworthy electrochemical properties for ORR activity, the prepared I/rGO can be considered an encouraging alternative for a more economical electrode for fuel cell fabrication and commercialization. In this perspective, the iodine-based catalysts synthesis can be considered a step forward for the metal-free electrocatalysts development for the oxygen reduction reaction in fuel cells.
碘掺杂的氧化石墨烯作为对氧还原反应（ORR）具有高活性的燃料电池（FC）电催化剂正引起广泛关注。然而，大多数已报道的碘掺杂石墨烯（I/rGO）制备技术都可转化为多步程序来实际应用，这对于扩大规模应用来说是一个显著缺点。在此，我们描述了一种通过微波调谐单阶段技术进行合成的有效、环保且快速的技术。结构和形态表征证明获得了纳米复合片材，其中碘键合在石墨烯基质中。对I/rGO的ORR性能进行了电化学研究，并注意到阴极峰有所增强。基于ORR活性的显著电化学性质，所制备的I/rGO可被视为用于燃料电池制造和商业化的更经济电极的一种令人鼓舞的替代物。从这个角度来看，碘基催化剂的合成可被视为燃料电池中氧还原反应无金属电催化剂开发向前迈进的一步。
