on understanding the influence of the conditions used in the calcination step of palladium catalysts on the performance of this catalyst in the reductive amination of halogen-containing substrates. The results show that increasing the calcination temperatures (from 100 °C to 400 °C) has a detrimental effect on catalytic activity but a strong positive effect on the selectivity (from 45 to 96%), avoiding
这项工作的重点是了解
钯催化剂的煅烧步骤中使用的条件对该催化剂在含卤素底物的还原胺化中的性能的影响。结果表明,提高煅烧温度(从 100 °C 到 400 °C)对催化活性有不利影响,但对选择性(从 45% 到 96%)有很强的积极影响,避免了不希望的脱卤反应。
TEM 研究表明,不同选择性的原因可以归因于不同的 Pd 平均粒径和粒径分布。特别是,在最高煅烧温度(400 °C)下获得的较大 Pd 颗粒对卤代
苄胺表现出最佳选择性(96%),