Mesoporous cubic Pd_xPt (x = 0.43–8.52) alloys with surface areas of 26–32 m²/g were synthesized using the KIT-6-templating method. Physicochemical properties of the materials were characterized by means of various techniques, and their catalytic activities were evaluated for methane combustion. It is found that the Pd and Pt were uniformly distributed in the Pd_xPt alloys. The addition of Pt to Pd exerted a significant effect on the redox property of Pd. The Pd_xPt alloys possessed a higher methane activation ability than the monometallic Pd. The oxidized Pd–Pt (i.e., PdO–PtO₂) were more active than the metallic Pd⁰–Pt⁰. The Pd_2.41Pt sample performed the best for methane combustion (T_10%, T_50%, and T_90% were 272, 303, and 322 °C at SV = 100,000 mL/(g h); TOF_Pd, TOF_Pt, TOF_Pd + Pt, and specific reaction rate at 280 °C were 0.85 × 10⁻³ s⁻¹, 1.98 × 10⁻³ s⁻¹, 0.59 × 10⁻³ s⁻¹, and 4.46 μmol/(g_cat s), respectively). The deactivation of the Pd_2.41Pt sample induced by 2.5–5.0 vol% CO₂ or H₂O addition was reversible, but its deactivation due to 100 ppm SO₂ introduction was irreversible. It is concluded that the excellent catalytic performance of the Pd_2.41Pt sample was associated with its good mesoporous structure, Pd–Pt alloy and PdO–PtO₂ coexistence, and good methane and oxygen activation ability.

使用KIT-6模板法合成 表面积为26-32 m ² / g的中孔立方Pd _x Pt（x = 0.43-8.52）合金。通过各种技术对材料的物理化学性质进行了表征，并对甲烷的燃烧活性进行了评估。发现Pd和Pt在Pd _x Pt合金中均匀分布。在Pd中添加Pt会对Pd的氧化还原性能产生重大影响。Pd _x Pt合金具有比单金属Pd更高的甲烷活化能力。氧化的Pd–Pt（即PdO–PtO ₂）比金属的Pd ⁰ –Pt ⁰更具活性。钯_2.41 Pt样品对甲烷燃烧表现最佳（T _10％，T _50％和T _90％为272、303和322°C，SV = 100,000 mL /（g h）; TOF _Pd，TOF _Pt，TOF _{Pd +的Pt}，在280℃，特定的反应率分别为0.85×10 ^-3 小号^-1，1.98×10 ^-3 小号^-1，0.59×10 ^-3 小号^-1，和4.46微摩尔/（克_猫 S），分别地） 。2.5–5.0 vol％CO ₂或H ₂引起的Pd _2.41 Pt样品失活O的添加是可逆的，但是由于引入100 ppm SO ₂而使其失活是不可逆的。结论是，Pd _2.41 Pt样品的优异催化性能与其良好的介孔结构，Pd-Pt合金和PdO-PtO ₂共存以及良好的甲烷和氧气活化能力有关。