Vasiliev Vladimir P, Manzhos Roman A, Kochergin Valeriy K, Krivenko Alexander G, Kabachkov Eugene N, Kulikov Alexander V, Shulga Yury M, Gutsev Gennady L
Institute of Problems of Chemical Physics of RAS, Acad. Semenov ave. 1, 142432 Chernogolovka, Russia.
Chernogolovka Scientific Center, Russian Academy of Sciences, 142432 Chernogolovka, Russia.
Materials (Basel). 2022 Jan 21;15(3):821. doi: 10.3390/ma15030821.
A simple method for the mechanochemical synthesis of an effective metal-free electrocatalyst for the oxygen reduction reaction was demonstrated. A nitrogen-doped carbon material was obtained by grinding a mixture of graphene oxide and melamine in a planetary ball mill. The resulting material was characterized by XPS, EPR, and Raman and IR spectroscopy. The nitrogen concentration on the N-bmGO surface was 5.5 at.%. The nitrogen-enriched graphene material (NbmGO has half-wave potential of -0.175/-0.09 V and was shown to possess high activity as an electrocatalyst for oxygen reduction reaction. The electrocatalytic activity of NbmGO can be associated with a high concentration of active sites for the adsorption of oxygen molecules on its surface. The high current retention (93% for 12 h) after continuous polarization demonstrates the excellent long-term stability of NbmGO.
展示了一种用于机械化学合成有效无金属氧还原反应电催化剂的简单方法。通过在行星式球磨机中研磨氧化石墨烯和三聚氰胺的混合物获得了一种氮掺杂碳材料。所得材料通过XPS、EPR以及拉曼光谱和红外光谱进行表征。N-bmGO表面的氮浓度为5.5原子%。富氮石墨烯材料（NbmGO）的半波电位为-0.175/-0.09 V，并且显示出作为氧还原反应电催化剂具有高活性。NbmGO的电催化活性可能与其表面上用于吸附氧分子的高浓度活性位点有关。连续极化后的高电流保持率（12小时内为93%）证明了NbmGO具有出色的长期稳定性。
