Fig. 2: Synthesis and characterization of HE-DRXs.

a Rapid synthesis of TM6 with UHS at 1100 °C in 3 s. b XRD pattern of TM6 synthesized by UHS. c TEM-EDS mapping of the TM6 particle. d XPS spectra of Mn 2p. SEM images of TM2 (e), TM4 (f) and TM6 (g) sintered at 1150 °C for 10 s. h Comparison of synthesis temperature and sintering temperature of TM2, TM4, and TM6.