Selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) was conducted over a series of FeO_x-doped Pt catalysts supported on a 15 wt% Al₂O₃@SBA-15 composite (15AS). It was found that the addition of FeO_x to the catalyst greatly improved its performance. With an optimal Fe/Pt molar ratio of 0.25, the PtFe_0.25/15AS catalyst reached a maximum reaction rate (defined as moles of converted CAL per gram of Pt per hour) of 13.93 mol g_Pt⁻¹ h⁻¹ with 76.9% selectivity to COL. Additionally, the PtFe_0.25/15AS catalyst afforded the highest TOF value (defined as moles of converted CAL per mole of Pt active sites per second) of 1.54 s⁻¹. X-ray photoelectron spectroscopy analyses and H₂ temperature-programmed reduction and CO diffuse-reflectance infrared Fourier-transformation spectroscopy studies reveal that there is strong interaction between Pt nanoparticles and Al₂O₃@SBA-15 composites and also between Pt and FeO_x, resulting in Pt species with a positive charge being dominant in PtFe_0.25/15AS catalysts. Therefore, Pt species with positive charges, together with FeO_x species, are beneficial for preferential adsorption and activation of carbonyl bonds of CAL, so that the activity and selectivity to COL were improved by PtFe_x/15AS catalysts (x represents the Fe/Pt molar ratio).

在一系列负载在15 wt％Al ₂ O ₃ @ SBA-15复合材料（15AS）上的FeO _x掺杂的Pt催化剂上，将肉桂醛（CAL）选择性氢化为肉桂醇（COL ）。发现向催化剂中添加FeO _x大大改善了其性能。Fe / Pt的最佳摩尔比为0.25时，PtFe _0.25 / 15AS催化剂的最大反应速率（定义为每克Pt每小时转化的CAL摩尔数）为13.93 mol g _Pt ^-1  h ^-1，选择性为76.9％到COL。此外，PtFe _0.25/ 15AS催化剂提供的最高TOF值（定义为每摩尔Pt活性位点每秒的转化CAL摩尔数）为1.54 s ^-1。X射线光电子能谱分析，H _2程序升温还原和CO漫反射红外傅里叶变换光谱研究表明，Pt纳米颗粒与Al ₂ O ₃ @ SBA-15复合材料之间以及Pt与FeO _x之间存在很强的相互作用。，导致在PtFe _0.25 / 15AS催化剂中具有正电荷的Pt物种占主导地位。因此，带正电荷的Pt物种与FeO _x一起物种，有利于CAL羰基键的优先吸附和活化，因此PtFe _x / 15AS催化剂提高了对COL的活性和选择性（x表示Fe / Pt摩尔比）。