Oxidized nanocarbons (ONCs) have been regarded as efficient electrocatalysts for H₂O₂ production. However, wet chemical procedures involving large volumes of strong acid and long synthetic time are usually needed to obtain these ONCs. Herein, a plasma activation strategy is developed as a rapid and environmentally benign approach to obtain various ONCs, including oxidized multiwalled carbon nanotubes, single-walled carbon nanotube, graphene, and super P carbon black. After a few minutes of plasma activation, oxygen-containing functional groups and defects can be effectively introduced onto the surface of nanocarbons. Enhanced electrocatalytic activity and selectivity are demonstrated by the plasma-ONCs for H₂O₂ production. Taking oxidized multiwalled carbon nanotubes as an example, high selectivity (up to 95%) and activity (0.75 V at 1 mA cm⁻²) can be achieved in alkaline solution. Moreover, ex situ x-ray photoelectron spectroscopy and in situ Raman measurements reveal that C–O, C=O, edge defect, and sp² basal planar defect are probably the active sites.

氧化纳米碳 (ONC) 已被认为是生产H ₂ O _{2 的}有效电催化剂。然而，通常需要涉及大量强酸和长合成时间的湿化学程序来获得这些 ONC。在此，等离子体活化策略被开发为一种快速且环境友好的方法来获得各种 ONC，包括氧化多壁碳纳米管、单壁碳纳米管、石墨烯和超级 P 炭黑。经过几分钟的等离子体活化，含氧官能团和缺陷可以有效地引入纳米碳表面。H ₂ O ₂的等离子体-ONCs 证明了增强的电催化活性和选择性生产。以氧化多壁碳纳米管为例，在碱性溶液中可以实现高选择性（高达95%）和活性（0.75 V at 1 mA cm ^-2）。此外，非原位X 射线光电子能谱和原位拉曼测量表明，C-O、C=O、边缘缺陷和 sp ²基底平面缺陷可能是活性位点。