The Synthesis And Characterization Of Several New Type Of Fuel Cell Catalysts

As one of the most promising materials,ordered mesoporous carbons have regular mesopore arrangement, excellent chemical/thermal stabilitya and high cinducivity,which makes them suitable for the applications in many high-tech application.Templating from proper block copolymers can lead to highly ordered mesostruture,which brings a series of opportunities in the development of creating various mesostructured carbonaceous frameworks.While this is a newly develolotped field,and there are still a lot of challenges in the synthesis of mesoporous carbon.This thesis empolys F127-P123 mixed triblock copolymer as templates,and phenolic resol as a carbon precursor to synthesize a mesoporous polymer,via evaporation induced self-assembly process, and carbonization a high temperature at three different rate.Then uses the mesoporous carbons to synthesize the Pt/OMC electrocatalysts by intermittent microwave heating method.When the rate of the high temperature carbonization is one degree per minute from three hundred to eight hundred degree,the mesoporous carbons can have better regular mesopore arrangement,and have more pores in the same district.When the F127-P123 mixed triblock copolymer is seven to three,the mesoporous carbons have a good structure with 2-D hexa hexagonal.But when the template changes to P123,the result is just a reticulate structure without good ordered mesoporous carbons.This thesis also has studied five Pt/C catalysts using the mesoporous carbons as catalyst support by intermittent microwave heating method. When the mixed triblock copolymer is seven to three, the Pt/OMC catalyst has better electricchemical property,and the Pt has a good distribution with the size of 4.1nm.