Electrochemical oxygen reduction has garnered attention as an emerging alternative to the traditional anthraquinone oxidation process to enable the distributed production of hydrogen peroxide. Here, we demonstrate a selective and efficient non-precious electrocatalyst, prepared through an easily scalable mild thermal reduction of graphene oxide, to form hydrogen peroxide from oxygen. During oxygen reduction, certain variants of the mildly reduced graphene oxide electrocatalyst exhibit highly selective and stable peroxide formation activity at low overpotentials (<10 mV) under basic conditions, exceeding the performance of current state-of-the-art alkaline catalysts. Spectroscopic structural characterization and in situ Raman spectroelectrochemistry provide strong evidence that sp²-hybridized carbon near-ring ether defects along sheet edges are the most active sites for peroxide production, providing new insight into the electrocatalytic design of carbon-based materials for effective peroxide production.

电化学氧还原作为传统蒽醌氧化工艺的新兴替代方法已经引起了人们的注意，该工艺使分布式生产过氧化氢成为可能。在这里，我们展示了一种选择性而有效的非贵金属电催化剂，该催化剂通过易于扩展的轻度氧化石墨烯热还原反应，由氧气形成过氧化氢而制备。在氧气还原过程中，轻度还原的氧化石墨烯电催化剂的某些变体在碱性条件下在低超电势（< 10 mV）下表现出高选择性和稳定的过氧化物形成活性，超过了当前最先进的碱性催化剂的性能。光谱结构表征和原位拉曼光谱电化学为sp ²提供了有力的证据沿薄板边缘的碳杂化的近端醚缺陷是过氧化物生产最活跃的部位，这为有效生产过氧化物的碳基材料的电催化设计提供了新的见识。