fig5

Figure 5. XPS spectra of Pt/TiO2 samples with various Pt loadings: (A) O 1s profiles; (B) atomic ratio of Pt0, Pt2+ and Pt4+.
Figure 5. XPS spectra of Pt/TiO2 samples with various Pt loadings: (A) O 1s profiles; (B) atomic ratio of Pt0, Pt2+ and Pt4+.
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