Ag nanoparticles on mixed Al2O3–Ga2O3 supports as catalysts for the N-alkylation of amines with alcohols
作者:Inge Geukens、Frederik Vermoortele、Maria Meledina、Stuart Turner、Gustaaf Van Tendeloo、Dirk E. De Vos
DOI:10.1016/j.apcata.2013.09.044
日期:2014.1
results in Ag nanoparticles that can selectively perform alcohol aminations under mild reaction conditions (110 °C). NaH not only serves as a reducing agent for the Ag salt, but also activates the alcohol for dehydrogenation to the corresponding ketone/aldehyde. The stability of the particles can be improved by immobilizing them onto mixed Al2O3–Ga2O3 supports; the combination of Ga and Al provides
AgNO 3与NaH的结合产生了Ag纳米颗粒,可以在温和的反应条件下(110°C)选择性地进行醇胺化反应。NaH不仅用作Ag盐的还原剂,而且还可以活化醇以脱氢成相应的酮/醛。将颗粒固定在混合的Al 2 O 3 -Ga 2 O 3上可以提高颗粒的稳定性。支持;与纯氧化铝或氧化镓载体相比,镓和铝的组合为材料提供了更强的路易斯酸性位点。这导致催化剂具有增强的活性,而无需添加外部路易斯酸。详细的TEM表征还揭示了Ag NP与氧化镓相之间的紧密相互作用。所获得的催化剂是可再循环的,并且在温和条件下使用多种脂族和芳族胺显示出对醇胺化的活性。