In this study, Au-Ce_0.5Zr_0.5O₂ (Au-CeZr) and Sm modified AuCeZr catalysts were synthesized by organic deposition-precipitation method using gold acetate and samarium acetate as Au and Sm precursors and tetrapropyl ammonium hydroxide as precipitating agent. The synthesized nanocrystalline Au-CeZr and Sm modified Au-CeZr materials found be effective catalysts for benzyl alcohol oxidation at low reaction temperatures. The catalysts were characterized by XRD, SEM, TEM, DRIFT spectra after pyridine adsorption, N₂-physisorption, XPS and H₂-TPR techniques. The Au nanoparticles are highly dispersed on CeZr support and XRD reflections due to presence of Au metal were not observed for the samples which contained less than 1.0 wt% Au. The XPS and H₂-TPR results revealed that at lower Au loadings, strong Au-CeZr interaction resulted an easy exclusion of surface oxygen ions in Au-CeZr and Sm-Au-CeZr catalysts. Pyridine adsorption results indicated an increase of Lewis acid sites of the CeZr support after Au deposition and Sm modification. The 2.0Sm-0.5Au-CeZr catalyst is most active and selective catalysts for benzyl alcohol oxidation among the synthesized catalysts due to optimum loading of Au and Sm. An optimal surface acidity and redox properties is accountable for the improved catalytic activity of 2.0Sm-0.5Au-CeZr catalyst in the benzyl alcohol oxidation.

本研究以乙酸金和乙酸sa为Au和Sm前驱体，以氢氧化四丙基铵为沉淀剂，通过有机沉积-沉淀法合成了Au-Ce _0.5 Zr _0.5 O ₂（Au-CeZr）和Sm改性的AuCeZr催化剂。发现合成的纳米晶Au-CeZr和Sm改性的Au-CeZr材料是在低反应温度下用于苯甲醇氧化的有效催化剂。通过吡啶吸附，N _2-物理吸附，XPS和H ₂的XRD，SEM，TEM，DRIFT光谱对催化剂进行了表征。-TPR技术。Au纳米颗粒高度分散在CeZr载体上，并且对于包含少于1.0wt％的Au的样品，未观察到由于存在Au金属而引起的XRD反射。XPS和H ₂-TPR结果表明，在较低的Au负载量下，较强的Au-CeZr相互作用导致Au-CeZr和Sm-Au-CeZr催化剂中的表面氧离子容易被排除。吡啶吸附结果表明，在Au沉积和Sm修饰后，CeZr载体的Lewis酸位增加。在合成的催化剂中，由于Au和Sm的最佳负载量，2.0Sm-0.5Au-CeZr催化剂是最有效的苄醇氧化催化剂。最佳的表面酸度和氧化还原性能是2.0Sm-0.5Au-CeZr催化剂在苯甲醇氧化中提高催化活性的原因。