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. 2022 Apr 28;13:2320. doi: 10.1038/s41467-022-29970-6

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Fig. 4 — a TGA analysis of AlOOH-U2 catalyst. b EPR spectra of different catalysts synthesized by different urea usage. c FTIR spectra and d XRD patterns of AlOOH-U2 catalyst with different treatment conditions.