Preparation And Application Of Palladium Nanoparticles Catalyst Synthesized By Bio-templates

Palladium nanoparticles with high catalytic activity, are much cheaper than platinum, so they have important application in industrial catalysis, energy and chemical fields. Palladium is usually loaded in a variety of organic compounds, carbon nanotubes and other metal alloys. Palladium catalyst has a large number of great advantage, such as dispersion, controllable size, high catalytic efficiency and easy separation of products, Nowadays, more and more focus has put to research the load type of palladium catalyst, which is becoming very important.There are many ways to synthesis the palladium nanoparticles, just like chemical synthesis and electrochemical deposition. Recent years, the large biological molecules as templates have received much attention, which are used for synthesis the Pd nanoparticles. These creatures template, which has nano structure metal space, specific binding sites and other characteristics, can be combined with palladium nanoparticles well. Moreover, creatures template has advantages of low preparation cost, biodegradable and green environmental protection. At present, many research groups used CYS mutant of tobacco mosaic virus(TMVcys) as biological template for the synthesis of Pd nanoparticles, but the protein modification with biological engineering is complex, even worse, the size of Pd nanoparticles is nonuniform.Palladium catalyzed Suzuki reaction is the basis of many materials synthesis reaction, it has been the focus in the palladium catalyzed organic reactions all the times. Most researchers use organic ligand to prepare palladium nanoparticles, but it’s preparation process is complex and easy to pollute the environment. In order to overcome that’s shortcoming, our laboratory is based on biological template preparation of palladium nanoparticles catalyzed Suzuki reaction.In our previous work, we have successfully controlled of insulin laboratory fibrils growth. In our experiments, we have prepared three kinds of particle size of palladium nanoparticles by controlling the ageing temperature. We also found that amyloid fibrils have a beta-sheet core structures and stable chemical properties, so that they are ideal biological template. We took insulin fibrils as bio-templates to prepare Pd nanoparticles catalysts, it has a good ability for Suzuki reaction, as well as the palladium nanoparticles size on the catalytic efficiency was discussed. Finally, we explored the reduction reaction of hydrogen peroxide catalyzed by Palladium catalysts, Further study of its catalytic performance.