Fig. 4: Synthesis and structural characterization of T-IrOx nanorods.
From: Tunnel-structured IrOx unlocks catalytic efficiency in proton exchange membrane water electrolyzers
a Schematic of the synthesis process for T-IrOx nanorods. b XRD patterns of T-IrOx synthesized at different temperatures. TEM images of T-IrOx synthesized at c 400 °C, d 500 °C, e 600 °C, and f 700 °C, with the inset in f showing a detailed view of the T-IrOx-700 nanorod tip. g HAADF-STEM image and corresponding FFT pattern of T-IrOx-400. Statistical distribution of h length and i width of T-IrOx nanorods synthesized at different temperatures based on 200 randomly selected rods per condition. j Aspect ratio of T-IrOx nanorods versus synthesis temperature. Error bars indicate standard deviation. Source data are provided as a Source data file.
