Fig. 2From: Construction of Pd Single Site Anchored on Nitrogen-Doped Porous Carbon and Its Application for Total Antioxidant Level DetectionMorphological and structural characterizations of the SA-Pd/NPC sample. a Typical TEM image; b HAADF-STEM images at magnification; c Schematic illustration of the peroxidase-like activity of SA-Pd/NPC SAzymes; d EPR spectrum for the detection of •OH radicalsBack to article page