The Preparation And Research Of PtSn/C Electrode For Catalyzing Direct Ethanol Fuel Cell

Direct ethanol fuel cell (DEFC) has been intensively researched and developed in recent years. It is significant to study on electro-catalysis of ethanol, not only of fundamental research but practical application. It is necessary to develop new catalysts with high performance for electrooxidation of ethanol.Carbon materials as catalyst matrix and the skeleton of porous gas diffusion electrode, with easy to get raw materials, low cost, high surface area and high conductivity characteristics, is becoming a topic carrier material for fuel cell electric-catalyst. Conductive fibrous polymer polyaniline (PANi) is also effective, because it can dispersing and deposition the Pt metal which has well catalytic activity and is widely application as carrier materials. In this experiment, two different substrates were used to prepare Pt/C and Pt-PANi/C catalyst electrodes. The impact of the different substrate materials on ethanol oxidation has been studyed, and it was found that the activity of use of carbon paper as a carrier material was significantly higher than in the basement of polyaniline prepared.We explored preparation of Pt/C catalyst for ethanol oxidation electrode by pulsating potential method and constant potential method. It was dicussed the best ectrochemical depositing parameters by PPM, and studied the electro-oxidation action of ethanol in the electrode.Constant potential method and cyclic voltammetry were used to deposition of tin to prepare PtSn/C electrodes, and we use cyclic voltammetry (CV), AC impedance (EIS), scanning electron microscopy (SEM) X-ray energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) to anlysis the characterization, such as studied by means of PtSn / C catalyst electrode oxidation, charge transfer resistance, electrode surface conditions, as well as the crystal structure of the metal surface, The results show that the addition of Sn metal has enhanced the catalytic ability of the electrode. At the same time, the effect of the loading radio of Pt and Sn on electrocatalytic properties of PtSn/C electrode was also researched.