fig4

Figure 4. Interactions between Ir species and TiO2 support of different samples. (A) In situ Ir 4d XPS spectra and (B) H2-TPR profiles. XPS: X-ray photoelectron spectroscopy; TPR: temperature-programmed reduction.
Figure 4. Interactions between Ir species and TiO2 support of different samples. (A) In situ Ir 4d XPS spectra and (B) H2-TPR profiles. XPS: X-ray photoelectron spectroscopy; TPR: temperature-programmed reduction.
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