The addition of MoO₃ in Pt/ZrO₂ catalysts significantly improves the activities for propane combustion. The highest activity (a reaction rate of 845.4 mol s^-1g_Pt^-1 and a turnover frequency (TOF) of 0.688 s⁻¹ at 200 °C) was obtained on a Pt-1Mo/ZrO₂ catalyst (with 1 wt% Mo content), which is much higher than that on the bare Pt/ZrO₂ (a reaction rate of 42.4 mol s^-1g_Pt^-1 and a TOF of 0.0186 s⁻¹ at 200 °C). Such improvement is due to the generation of the Pt-MoO₃ interfacial sites, on which the cleavage of C-H bond and decomposition of the surface carbonates were accelerated. Moreover, the intrinsic activities of active Pt sites (TOF_Pt) and Pt-MoO₃ interfacial sites (TOF_Pt-MoO3) were clearly differentiated, namely, the interfacial sites possess ca. 40-fold higher activity than the Pt surface atoms (with TOF_Pt-MoO3 of 0.731 s⁻¹ at 200 °C versus TOF_Pt of 0.0186 s⁻¹) for Pt-1Mo/ZrO₂ catalyst.

在Pt / ZrO ₂催化剂中添加MoO ₃可以显着提高丙烷燃烧的活性。在Pt-1Mo / ZrO ₂催化剂（含1 wt％）上，获得最高活性（在200°C下反应速率为845.4 mol s ^-1 g _Pt ^-1和转换频率（TOF）为0.688 s ^-1）。Mo含量）远高于裸Pt / ZrO ₂上的Mo含量（200°C下的反应速率为42.4 mol s ^-1 g _Pt ^-1和TOF为0.0186 s ^-1）。这种改善归因于Pt-MoO _3的产生界面部位，CH键断裂和表面碳酸盐分解加速。此外，活性Pt位点（TOF _Pt）和Pt-MoO ₃界面位点（TOF _Pt-MoO3）的内在活性也有明显的区别，即界面位点大约为2。对于Pt-1Mo / ZrO ₂催化剂，其活性比Pt表面原子高40倍（在200°C下TOF _Pt-MoO3为0.731 s ^-1，而TOF _Pt为0.0186 s ^-1）。