Fig. 1: Synthesis and characterization of h-ATO/RuO₂.

a Schematic illustration of the h-ATO/RuO₂ synthesis process. b, c SEM images of h-ATO (b) and h-ATO/RuO₂ (c). d, e TEM images of h-ATO/RuO₂. f, g HRTEM image and EDX elemental mappings of h-ATO/RuO₂.