Figure 1 (IMAGE)

Advanced Institute for Materials Research (AIMR), Tohoku University

Figure 1

Caption

(a, b) Two-dimensional surface Pourbaix diagrams of α-PbO₂ (110) and β-PbO₂ (110), respectively. Ov represents the oxygen vacancy. (c) Schematic illustration of the possible reaction mechanisms of propylene oxidation on PbO₂ (110), including the one-step direct epoxidation and the competing initial dehydrogenation. (d, e) Calculated free energy profiles of direct propylene epoxidation and the initial propylene dehydrogenation on α-PbO₂ (110) and β-PbO2 (110), respectively.

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Jia Ge et al.

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