Abstract Chlorine-free Platinum/nitrogen-doped graphene oxygen reduction reaction catalysts were synthesized by a one step method of annealing a mixture of platinum acetylacetonate and graphene oxide under ammonia atmosphere. Nanoparticles with close to the ideal particle size for oxygen reduction reaction (ORR) were formed, i.e., with diameter of 3–4 nm (500 and 600 °C) and 6 nm (700 °C). X-ray photoelectron spectroscopy confirmed the successful introduction of both pyridinic and pyrrolic type nitrogen moieties into the graphene layers, which indicates a strong interaction between the nanoparticles and the graphene layers. The electrocatalytic activity of glassy carbon electrodes (GCE) modified with the synthesized Pt/NG samples for oxygen reduction was compared to that of a platinum/carbon black catalyst modified electrode in acidic and alkaline media. Based on the measured limiting current densities and calculated electron transfer number, the highest activity was measured in acidic and alkaline media on the samples annealed at 600 and 700 °C, respectively.

中文翻译：

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用于氧还原反应的无氯Pt/氮掺杂石墨烯复合材料的一步合成

摘要 采用乙酰丙酮铂和氧化石墨烯混合物在氨气氛下一步法退火合成无氯铂/氮掺杂石墨烯氧还原反应催化剂。形成了接近氧还原反应 (ORR) 理想粒径的纳米颗粒，即直径为 3-4 nm（500 和 600 °C）和 6 nm（700 °C）。X 射线光电子能谱证实成功将吡啶型和吡咯型氮部分引入石墨烯层，这表明纳米颗粒和石墨烯层之间存在强相互作用。将合成的 Pt/NG 样品修饰的玻璃碳电极 (GCE) 的电催化活性与铂/炭黑催化剂修饰的电极在酸性和碱性介质中的电催化活性进行了比较。根据测量的极限电流密度和计算的电子转移数，分别在 600 和 700 °C 下退火的样品在酸性和碱性介质中测得最高活性。