He Yufei, Feng Junting, Brett Gemma L, Liu Yanan, Miedziak Peter J, Edwards Jennifer K, Knight David W, Li Dianqing, Hutchings Graham J
State Key Laboratory of Chemical Engineering, Beijing University of Chemical Technology, 98#, No.15, Beisanhuan East Road, Beijing, 100029, China.
Cardiff Catalysis Institute, Cardiff University, Cardiff, CF10 3AT, UK.
ChemSusChem. 2015 Oct 12;8(19):3314-22. doi: 10.1002/cssc.201500503. Epub 2015 Sep 4.
Precious metal nanoparticles supported on magnesium-aluminum hydrotalcite (HT), TiO2 , and MgO were prepared by sol immobilization and assessed for the catalytic oxidation of octanol, which is a relatively unreactive aliphatic alcohol, with molecular oxygen as the oxidant under solvent- and base-free conditions. Compared with the TiO2 - and MgO-supported catalysts, platinum HT gave the highest activity and selectivity towards the aldehyde. The turnover number achieved for the platinum HT catalyst was >3700 after 180 min under mild reaction conditions. Moreover, the results for the oxidation of different substrates indicate that a specific interaction of octanal with the platinum HT catalyst could lead to deactivation of the catalyst.
通过溶胶固定法制备了负载在镁铝水滑石（HT）、TiO₂和MgO上的贵金属纳米颗粒，并评估了它们在无溶剂和无碱条件下以分子氧为氧化剂催化氧化辛醇的性能，辛醇是一种相对不活泼的脂肪醇。与负载在TiO₂和MgO上的催化剂相比，负载铂的HT对醛具有最高的活性和选择性。在温和的反应条件下，铂HT催化剂在180分钟后实现的周转数大于3700。此外，不同底物氧化的结果表明，辛醛与铂HT催化剂的特定相互作用可能导致催化剂失活。
