The development of robust metal-free catalysts for electrochemical oxygen reduction reaction (ORR) is a great challenge due to the large energy barriers for the intermediate *OO⁻ formation. In this work, an ionic liquid (IL) modified N/S co-doped graphene oxide (IL-SNG) was synthesized and explored as a metal-free ORR catalyst in alkaline conditions. Compared to the electrode without IL modification (SNG), the onset and half-wave potentials of IL-SNG were positively shifted by 130 and 110 mV, respectively. The IL and co-doping effects enable IL-SNG a comparable activity to that of Pt/C catalyst in alkaline solution. In addition to impressive activity, IL-SNG exhibits a superior tolerance to methanol and excellent long-term stability over Pt/C under the identical conditions, enabling it a potential candidate for ORR in alkaline conditions. DFT calculation shows that IL enhances O₂ adsorption and stabilizes the high-energy *OO⁻ intermediate by forming ion pairs and therefore boosts the catalytic activity.

由于中间体* OO-具有较大的能垒，因此开发用于电化学氧还原反应（ORR）的耐用的无金属催化剂是一项巨大的挑战^。编队。在这项工作中，合成了一种离子液体（IL）改性的N / S共掺杂氧化石墨烯（IL-SNG），并在碱性条件下用作无金属的ORR催化剂。与没有IL修饰（SNG）的电极相比，IL-SNG的起始和半波电势分别正向偏移130和110 mV。IL和共掺杂效应使IL-SNG具有与碱性溶液中Pt / C催化剂相当的活性。除了令人印象深刻的活性外，IL-SNG在相同条件下还具有优于Pt / C的甲醇耐受性和出色的长期稳定性，使其成为碱性条件下ORR的潜在候选者。DFT计算表明IL增强Ò ₂吸附并稳定高能* OO ^- 通过形成离子对形成中间体，因此提高了催化活性。