XPS study of surface oxidation of carbon-supported Pt catalysts

Selective hydrogenation of levulinic acid to γ-valerolactone over carbon-supported noble metal catalysts

“…3c) showed two broad peaks (around 69.5-70 eV range) corresponding to Pt 0 and other shoulder peak at 72.6 eV. The BE peak at 71.2 eV corresponded to Pt 0 species as reported in the literature [24,29,30], which has been marginally shifted to lower value and this could be attributed to metal support interaction. However, the BE value of 72.6 eV (Fig.…”

Recent advances in activity and durability enhancement of Pt/C catalytic cathode in PEMFC

“…Several studies of electrochemical formation of surface oxides on carbon black in acidic electrolytes at elevated temperatures have appeared in the literatures [38][39][40][41][42]. The kinetics of carbon oxidation to surface oxides, adsorption of these oxides on the platinum surface, and ease of subsequent carbon oxidation to CO 2 have been investigated.…”

Pt-Ce0.9 Cu0.1 O2 /activated carbon as highly active and stable HI decomposition catalyst

“…33 Comparing with BE of metallic Pt at70.9 eV, 34 positive shift in BE of Pt4f 7/2 to 7.13 eV was observed, and this may be assigned to the influence of metal support interaction. 35 It can be concluded that the most of Pt was reduced to Pt metal while part of Pt were still Pt 4+ , which could be chemically interact with Cu + . 35 It can be concluded that the most of Pt was reduced to Pt metal while part of Pt were still Pt 4+ , which could be chemically interact with Cu + .…”

“…Moreover, small broad peaks were also observed at 76.6 and 77.9 eV, which were assigned to PtO 2. 35 It can be concluded that the most of Pt was reduced to Pt metal while part of Pt were still Pt 4+ , which could be chemically interact with Cu + . O1s peaks in Figure 9D centered about 532 and 531 eV indicated 2 oxygen species exist in Pt-CeCuO 2 /M563, which were assigned to oxygen containing at AC surface (may be carbonate in AC) and bulk oxygen in ceria, respectively.…”