Synthetize And Study Of Ordered Mesoporous Non-Pt Catalyst For Oxygen Reduction Reaction In PEMFC

In the blossom of modern society,the car can be seen everywhere and become the indispensable means of transport because of its convenient and efficient.But the consumption of trsditional energy sources has result in lots of harmful gased,environment pollution,particularly air pollution,increasing the content of inhalable particles in the air,destroying ecosystem and our normal life,harming our body,so we need to find a kind of green energy sources to solve the problems.PEMFC is a high efficient and environmental energy conversion.During conversion almost 80%of energy can be used,increasing the efficiency of energy to a great extent.But the high cost and low durability limt the wide application of PEMFC.The main source of cost is Pt catalyst,especially in cathode.Because of the birdnesting and loss of Pt,the life time of PEMFC decrease,so the development of PEMFC cathode non-noble metal catalysts has important value and significance.?1?In this paper,Fe-N-C-PANI ordered catalysts was synthesized by ethanol volatilization self-assembly means,using F127 as the template,polyaniline as the nitrogen source,TOEs as the silicon source.XRD,TEM and XPS techniques were employed to observe and analyze the composition,morphology and ordered mesoporous structure of the catalysts.Electrochemical test was used to characterize the ORR performance of ordered mesoporous structure catalyst.Accelerated Aging Test was used to characterize the the stability of the catalyst.The results show that when the condition is that the addition of polyaniline,Fe salt and TOEs were 0.2g,0.2020g and 2.08g,respectively,themolysis in 800?,prepared ordered mesoporous catalyst Fe-N-C-PANI has the most complete two-dimensional hexagonal pore structure,the highest degree of order,some hollow carbon rod,the highest specific area,1007 m² g^–1 and the highest ORR activity.In ORR,the number of electron transfer is 3.9,and the stability is also better than 20 wt%of Pt/C in acid solution.?2?Fe and Co doped ordered mesoporous catalysts FeCo-N-C-PANI was synthesized by ethanol volatilization self-assembly method,using F127 as the template,polyaniline as the nitrogen source,optimizing the proportion of the addition of Fe and Co.XRD,TEM,XPS and electrochemical test techniques were employed to observe and analyze the composition,morphology and ORR performance of the orderd catalysts.Accelerated Aging Test was used to characterize the stability of the catalyst.The results show that when the molar ratio of Fe and Co was 3:1,prepared ordered mesoporous catalyst FeCo-N-C-PANI has the highest ORR activity,with a half-wave potential of 0.78 Vvs.RHE and a onset potential of 0.9Vvs.RHE.In ORR,the number of electron transfer is 3.92,and the stability is also better than 20 wt%of Pt/C and Fe-N-C-PANI in acid solution.