Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Moscow 119991, Russia.
ACS Appl Mater Interfaces. 2017 Oct 25;9(42):36723-36732. doi: 10.1021/acsami.7b09173. Epub 2017 Oct 12.
Metal on carbon catalysts (M/C) are ubiquitously used in modern research and industry to carry out a variety of chemical transformations. Stable metal-support frameworks and inertness of the carbon materials are usually taken for granted in these very useful catalytic systems. Initially, the present study was aimed to increase the efficiency of Pd/C and Pt/C catalytic systems under microwave and conventional heating. Interestingly, a dynamic behavior of the metal nanoparticles was revealed, and a series of carbon support transformations occurred during the thermal treatments of the catalysts. Microwave and thermal heating of the M/C catalysts resulted in substantial transformations of the carbon supports via the formation of pits, trenches, nanofibers, and nanowalls. Detailed studies with field-emission scanning electron microscopy were carried out involving statistical averaging over large surface areas. The effects of the dynamic behaviors of the supported metal particles on the catalytic activities of the synthetically useful Mizoroki-Heck and Suzuki-Miyaura reactions were demonstrated. Revealed dynamic behavior and modification of the carbon support due to microwave treatment were observed in a number of M/C systems (M = Pd, Pt, Ni, Co, Cu, Fe, and Au).
金属碳催化剂（M/C）在现代研究和工业中被广泛用于进行各种化学转化。在这些非常有用的催化系统中，通常认为稳定的金属-载体框架和碳材料的惰性是理所当然的。最初，本研究旨在提高 Pd/C 和 Pt/C 催化系统在微波和常规加热下的效率。有趣的是，揭示了金属纳米粒子的动态行为，并且在催化剂的热处理过程中发生了一系列碳载体的转化。M/C 催化剂的微波和热加热导致碳载体通过形成凹坑、沟槽、纳米纤维和纳米墙而发生实质性转化。通过场发射扫描电子显微镜进行了详细的研究，涉及对大表面积进行统计平均。证明了负载金属颗粒的动态行为对合成有用的 Mizoroki-Heck 和 Suzuki-Miyaura 反应的催化活性的影响。在许多 M/C 体系（M=Pd、Pt、Ni、Co、Cu、Fe 和 Au）中观察到由于微波处理而导致的碳载体的动态行为和修饰。
