Ni doped hierarchical micro‐mesoporous AlPO‐5 molecule sieve (HP‐NiAlPO‐5) was prepared and evaluated as the heterogeneous catalyst for the synthesis of imines by direct condensation of amines and easily accessible alcohols. The catalyst exhibits encouraging efficiency with isolated yields up to 95% and turnover frequency (TOF) number up to 10.7 h⁻¹ for a variety of amines and alcohols with varied substrates and properties. The moderate reaction conditions, namely, room temperature of 303 K and air as the oxidant, together with the decent stability and reusability after cycles, make HP‐NiAlPO‐5 a promising alternative for the future large‐scale applications. Characterizations and detailed comparison among catalysts with different compositions revealed that the superiority of HP‐NiAlPO‐5 can be attributed to synergistic effects of the uniform framework of the AlPO‐5 molecular sieve and readily accessibility of highly dispersed Ni nano particles on hierarchical micro‐mesoporous support. It was found that the levels of H₂ consumption on several metals during H₂ temperature programmed reduction are directly related to their catalytic performances.

中文翻译：

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镍掺杂的磷酸铝-5作为在室温下直接将醇和胺缩合合成亚胺的高效多相催化剂

制备了Ni掺杂的分级微介孔AlPO-5分子筛（HP-NiAlPO-5），并将其评估为通过胺和容易获得的醇直接缩合合成亚胺的非均相催化剂。该催化剂显示出令人鼓舞的效率，分离产率高达95％，周转频率（TOF）数高达10.7 h ^-1用于各种具有不同底物和特性的胺和醇。适度的反应条件，即303 K的室温和空气作为氧化剂，再加上循环后的良好稳定性和可重复使用性，使HP-NiAlPO-5成为未来大规模应用的有希望的替代品。在不同组成的催化剂之间进行表征和详细比较后发现，HP-NiAlPO-5的优越性可以归因于AlPO-5分子筛的统一框架的协同效应以及高度分散的Ni纳米颗粒在分层微介孔中的可及性。支持。发现在H ₂期间几种金属的H ₂消耗水平 程序升温还原与它们的催化性能直接相关。