将MgO作为助剂用于苯胺和乙二醇直接气相合成吲哚Cu/SiO2催化剂中,通过X射线衍射、程序升温还原和热重分析对催化剂进行了表征. 结果表明,适量(如0.17 mmol/g)MgO的添加不仅提高了催化剂的活性,而且显著增强了催化剂的稳定性. 加入的MgO可与CuO发生一定的相互作用,从而改善铜在二氧化硅表面上的分散,抑制铜在反应过程中的烧结. 此外,MgO还减少了催化剂的积炭.
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