Mechanochemically induced low-temperature preparation of nitrogen-doped few-layer graphenes (N-Gr) and their application as electrocatalysts of oxygen reduction reaction (ORR) in alkaline medium was shown. The proposed approach allowed achieving a high proportion of graphitic nitrogen atoms. Such doping of N-Gr caused healing of vacancies in its structure, and also lead to the increased charge carrier density and high reduction ability that support advanced electrocatalytic characteristics in ORR (the onset and half-wave potentials equal to 0.98 and 0.77 V vs RHE, the average electron transfer number close to four, the Tafel slope about 60 mV/dec), the absolute values of which are close to those of the platinum-based catalyst. A model of N-Gr-based zinc-oxygen cell could provide a discharge current density of ∼40 mA/cm² at a potential of 1 V and peak power density about 100 mW/cm², as well as high cathode stability during cycling.

机械化学诱导低温制备氮掺杂的少层石墨烯 (N-Gr) 及其在碱性介质中作为氧还原反应 (ORR) 的电催化剂的应用。所提出的方法允许实现高比例的石墨氮原子。N-Gr 的这种掺杂导致其结构中的空位愈合，并导致载流子密度增加和高还原能力，支持 ORR 中先进的电催化特性（起始和半波电位等于 0.98 和 0.77 V vs RHE ，平均电子转移数接近4，Tafel斜率约为60 mV / dec），其绝对值接近铂基催化剂的绝对值。基于 N-Gr 的锌-氧电池模型可提供约 40 mA/cm ²的放电电流密度在 1 V 的电位和约 100 mW/cm ^{2 的}峰值功率密度下，以及循环期间的高阴极稳定性。