Supported Pt catalysts with different Fe/Pt atomic ratios were synthesized using controlled surface reactions to deposit (cyclohexadiene) iron tricarbonyl onto Pt/SiO₂ to create Pt-Fe_xO_y interfacial sites. X-ray photoelectron spectroscopy measurements show that Pt and Fe species exist as metallic Pt and Fe oxides phases, respectively, after treatment in H₂ at 573 K, whereas Fe becomes more oxidized under reaction conditions for CO oxidation at 313 K (CO:O₂ = 1:1). The addition of Fe increases the turnover frequency of Pt₁Fe_x/SiO₂ at 313 K and atmospheric pressure by up to two orders of magnitude compared to Pt/SiO₂. The reaction order with respect to the O₂ partial pressure suggests that O₂ adsorption on the surface is likely to be a rate controlling step for both Pt/SiO₂ and Pt₁Fe_0.2/SiO₂. The enhanced activity over Pt₁Fe_x/SiO₂ catalysts compared to Pt/SiO₂ can be associated with a lower energy barrier for O₂ adsorption and activation over Pt-Fe_xO_y interfacial sites.

使用受控的表面反应合成了具有不同Fe / Pt原子比的负载Pt催化剂，以将（环己二烯）三羰基铁沉积到Pt / SiO _2上以创建Pt-Fe _x O _y界面位。X射线光电子能谱测量表明，在573 K的H ₂中处理后，Pt和Fe分别以金属Pt和Fe氧化物的形式存在，而Fe在313 K（CO：O ₂  = 1：1）。的添加Fe的增加Pt组成的周转频率₁的Fe _X /二氧化硅₂在313 K和大气压力高达两个数量级相比的Pt /二氧化硅₂。关于O ₂分压的反应顺序表明，对于Pt / SiO ₂和Pt ₁ Fe _0.2 / SiO ₂，表面上的O ₂吸附很可能是速率控制步骤。与Pt / SiO ₂相比，Pt ₁ Fe _x / SiO ₂催化剂的活性增强与在Pt-Fe _x O _y界面位上的O ₂吸附和活化能较低。