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首页> 外文期刊>RSC Advances >Palladium catalyst supported on N-aminoguanidine functionalized magnetic graphene oxide as a robust water-tolerant and versatile nanocatalyst
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Palladium catalyst supported on N-aminoguanidine functionalized magnetic graphene oxide as a robust water-tolerant and versatile nanocatalyst

机译：负载在N-氨基胍官能化的氧化石墨烯上的钯催化剂是一种坚固的耐水多功能纳米催化剂

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摘要

A novel heterogeneous Pd catalyst has been developed by decorating palladium onto the surface of N-aminoguanidine functionalized magnetic graphene oxide nanosheets (denoted as Pd@AGu-MGO), while the diethylene glycol (DEG) group has been applied as an organic spacer. The usefulness of the Pd@AGu-MGO nanocatalyst was investigated in palladium catalyzed organic reactions including Heck/Suzuki couplings of aryl halides and reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The nanocatalyst showed high efficiency and thermal stability (up to 300 degrees C). The catalyst recovery test was performed using an external magnet device, and showed that this catalyst can be reused several times without a significant decrease in its performance and catalytic activity. The loading level of Pd in the Pd@AGu-MGO catalyst was assessed as 0.9 mmol g(-1) by ICP-AES and elemental analysis. This catalyst is more remarkable from the environmental and economic points of view because of its key properties such as high efficiency and turnover frequency (TOF), mild reaction conditions, utilization of green solvent, simple product work-up, and easy catalyst recovery.
机译：通过将钯修饰到N-氨基胍官能化的氧化石墨烯纳米片（表示为Pd @ AGu-MGO）的表面上，已开发出一种新型的非均相Pd催化剂，而二甘醇（DEG）基团已用作有机间隔基。在钯催化的有机反应中研究了Pd @ AGu-MGO纳米催化剂的有用性，包括芳基卤化物的Heck / Suzuki偶联以及将4-硝基苯酚（4-NP）还原为4-氨基苯酚（4-AP）。纳米催化剂显示出高效率和热稳定性（高达300摄氏度）。使用外部磁体装置进行催化剂回收测试，结果表明该催化剂可以重复使用几次，而其性能和催化活性没有明显降低。通过ICP-AES和元素分析，Pd @ AGu-MGO催化剂中Pd的负载量为0.9 mmol g（-1）。从催化剂的环境和经济角度来看，该催化剂更为出色，因为它具有关键特性，例如高效和周转频率（TOF），温和的反应条件，绿色溶剂的利用，简单的产品后处理以及易于回收的催化剂。

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