The drive to replace scarce and expensive Pt-based electrocatalysts for oxygen reduction reaction (ORR) has led to the development of a group of electrocatalysts composed of transition-metal ion centers coordinated with four nitrogen groups (M-N4). Among these, metal phthalocyanines (MPcs), due to low cost of preparation, highly conjugated structure as well as high thermal and chemical stability, have received a great interest. The catalytic activity of MPcs can be improved by employing conducting supports. Here, in this report, we have solvothermally synthesized graphene-supported zinc phthalocyanine nanostructures, and their ORR kinetics and mechanism have been investigated in neutral solution (pH = 7) by using the rotating disk electrode technique. The as-synthesized nanocomposite followed a 4e− reduction pathway. The onset potential (−0.04 V versus Ag/AgCl) found in this work can be comparable with other state-of-the-art material, demonstrating good performance in neutral solution. The fascinating performance leads the nanocomposite material toward future energy applications.

中文翻译：

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石墨烯/酞菁纳米复合材料在中性介质中的 ORR 性能研究

取代稀有和昂贵的铂基电催化剂用于氧还原反应 (ORR) 的驱动力导致开发了一组由与四个氮基团配位的过渡金属离子中心 (MN) 组成的电催化剂。4）。其中，金属酞菁（MPcs）由于制备成本低、高度共轭结构以及高的热稳定性和化学稳定性而受到了极大的关注。MPcs的催化活性可以通过使用导电载体来提高。在这里，在本报告中，我们已经溶剂热合成了石墨烯负载的锌酞菁纳米结构，并通过使用旋转圆盘电极技术在中性溶液（pH = 7）中研究了它们的 ORR 动力学和机制。合成后的纳米复合材料遵循 4e-减少途径。在这项工作中发现的起始电位（-0.04 V 与 Ag/AgCl）可以与其他最先进的材料相媲美，在中性溶液中表现出良好的性能。令人着迷的性能使纳米复合材料走向未来的能源应用。