载硅藻土的 Pd-M（M=Cu、Co、Ni）双金属纳米催化剂用于长链脂肪酯的选择性加氢。
Diatomite-supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts for selective hydrogenation of long-chain aliphatic esters.
机构信息
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
出版信息
J Colloid Interface Sci. 2012 Nov 15;386(1):60-5. doi: 10.1016/j.jcis.2012.07.032. Epub 2012 Jul 23.
Diatomite supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts with various metal compositions were prepared and characterized by means of X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated that the metal nanoparticles were uniformly distributed on the support, and their size was centered around 8 nm with a relatively narrow size distribution. The catalysts were used to catalyze hydrogenation of long-chain aliphatic esters, including methyl palmitate, methyl stearate, and methyl laurate. It was indicated that the all diatomite-supported Pd-based bimetal catalysts were active to the selective hydrogenation of long-chain esters to corresponding alcohols at 270°C, originated from the synergistic effect between the metal particles and the diatomite support. For the selective hydrogenation of methyl palmitate, Pd-Cu/diatomite with metal loading of 1% and Pd/Cu=3 displayed the highest performance, giving a 1-hexadecanol yield of 82.9% at the substrate conversion of 98.8%.
采用 X 射线衍射、透射电子显微镜和 X 射线光电子能谱对负载不同金属组成（M=Cu、Co、Ni）的 Pd-M（M=Cu、Co、Ni）双金属纳米催化剂进行了制备和表征。结果表明，金属纳米颗粒均匀分布在载体上，其尺寸集中在 8nm 左右，具有较窄的尺寸分布。这些催化剂被用于催化长链脂肪酯的加氢反应，包括棕榈酸甲酯、硬脂酸甲酯和月桂酸甲酯。结果表明，所有负载在硅藻土上的基于 Pd 的双金属催化剂在 270°C 下对长链酯的选择性加氢反应具有活性，这源于金属颗粒和硅藻土载体之间的协同效应。对于棕榈酸甲酯的选择性加氢反应，负载量为 1%、Pd/Cu=3 的 Pd-Cu/硅藻土表现出最高的性能，在底物转化率为 98.8%时，1-十六烷醇的收率达到 82.9%。
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