Supported Cobalt Oxide Nanoparticles As Catalyst for Aerobic Oxidation of Alcohols in Liquid Phase
Supported Cobalt Oxide Nanoparticles As Catalyst for Aerobic Oxidation of Alcohols in Liquid Phase
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DOI：
10.1021/cs100153a
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发表时间：
2011-03
期刊：
影响因子：
12.9
通讯作者：
Junjiang Zhu;K. Kailasam;A. Fischer;Arne Thomas
中科院分区：
文献类型：
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作者：
Junjiang Zhu;K. Kailasam;A. Fischer;Arne Thomas
负载型钴氧化物纳米颗粒（NP）已经通过在不同载体上的湿浸渍和随后在氩气中在350 °C下热处理2小时来制备。由此制备的氧化钴（Co 3 O 4）可以很好地分散在碳质材料如活性炭（AC）和共价三嗪骨架（CTF）上，平均粒径小于5 nm。以液相中醇类的好氧氧化反应考察了负载型Co 3 O 4纳米粒子的催化性能。结果表明，AC负载的Co 3 O 4纳米颗粒（Co 3 O 4/AC）对醇氧化的转化率为100%，并且当进行热再生步骤时，可以重复使用至少4次而不会明显损失活性，这表明Co 3 O 4纳米颗粒很好地嵌入并稳定在载体上，使Co 3 O 4/AC成为液相醇有氧氧化的有前途的催化剂。
Supported cobalt oxide nanoparticles (NPs) have been prepared by wetness impregnation on different supports and subsequent heat treatment in argon at 350 °C for 2 h. The thus prepared cobalt oxide (Co3O4) can be well dispersed on carbonaceous materials such as activated carbon (AC) and covalent trizaine frameworks (CTF), with average particle sizes below 5 nm. The catalytic performance of supported Co3O4 NPs was tested by aerobic oxidation of alcohols in liquid phase. The results show that AC supported Co3O4 NPs, Co3O4/AC, exhibit ∼100% conversions for alcohol oxidation and can be reused for at least 4 runs without appreciable loss of activity, when a thermal regeneration step is carried out, suggesting that the Co3O4 NPs are well embedded and stabilized on the support, making Co3O4/AC a promising catalyst for aerobic oxidation of alcohols in liquid phase.