Kondrat Simon A, Miedziak Peter J, Douthwaite Mark, Brett Gemma L, Davies Thomas E, Morgan David J, Edwards Jennifer K, Knight David W, Kiely Christopher J, Taylor Stuart H, Hutchings Graham J
ChemSusChem. 2014 May;7(5):1326-34. doi: 10.1002/cssc.201300834.
Base-free selective oxidation of glycerol has been investigated using trimetallic Au–Pd–Pt nanoparticles supported on titania and their corresponding bimetallic catalysts. Catalysts were prepared by the sol-immobilization method and characterized by means of TEM, UV/Vis spectroscopy, diffuse reflectance infrared fourier transform spectroscopy, X-ray photoelectron spectroscopy, and microwave plasma–atomic emission spectroscopy. It was found that of the bimetallic catalysts, Pd–Pt/TiO2 was the most active with high selectivity to C3 products. The addition of Au to this catalyst to form the trimetallic Au–Pd–Pt/TiO2, resulted in an increase in activity relative to Pd–Pt/TiO2. The turnover frequency increased from 210 h(−1) with the Pd–Pt/TiO2 catalyst to378 h(−1) for the trimetallic Au–Pd–Pt/TiO2 catalyst with retention of selectivity towards C3 products.
已使用负载在二氧化钛上的三金属金 - 钯 - 铂纳米颗粒及其相应的双金属催化剂研究了甘油的无碱选择性氧化。通过溶胶固定法制备催化剂，并通过透射电子显微镜（TEM）、紫外可见光谱、漫反射红外傅里叶变换光谱、X射线光电子能谱和微波等离子体原子发射光谱对其进行表征。结果发现，在双金属催化剂中，Pd - Pt/TiO₂对C₃产物具有高选择性且活性最高。向该催化剂中添加金以形成三金属Au - Pd - Pt/TiO₂，相对于Pd - Pt/TiO₂，活性有所增加。周转频率从Pd - Pt/TiO₂催化剂的210 h⁻¹增加到三金属Au - Pd - Pt/TiO₂催化剂的378 h⁻¹，同时对C₃产物的选择性保持不变。
