Fig. 2: 1O2 generation performance via O2 activation.

a TEMP-based EPR spectra for 1O2. b DMPO-based EPR spectra for ·OH and ·O2-. c TEMP-based EPR spectra for 1O2 in different conditions. d A DPBF probe experiment for CMCN. e Time-dependent concentration of 1O2 detected by DMA. f Comparison of 1O2 production rate of CMCN (short-range sites) and CoCN + MoCN (Long-range sites). g Comparison of ROS production rate with reported materials (inset: schematic representation of the O2 activation process). h Comparison of 1O2 production rate with reported materials. Error bars represent the standard deviation of the experiment in triplicate.