Synthesis and Characterization of Pt-Ir Metal Catalysts by Thermal Decomposition Process and Applied to URFC

• Main Authors: En Xian Lin, 林恩賢
• Other Authors: Sheng-Chang Wang
• Format: Others
• Language: zh-TW
• Published: 101
• Online Access: http://ndltd.ncl.edu.tw/handle/32320448240112538855

碩士 === 南台科技大學 === 能源工程研究所 === 100 === This research aimed at studies to prepare novel PtIr catalysts of oxygen electrode nano-catalysts and employ in Unitized Regenerative Fuel Cell by thermal decomposition method. The process used the oleic acid, stearic acid as a solvent and oleylamine, oleyl alcohol as surfactant. Different ratio of Pt/Ir bimetallic nanoparticles were prepared by changing the relative ratios of PtIr, temperature, and surfactants to study the catalytic ability for fuel cell mode and water electrolysis mode. XRD and TEM analysis were conducted to characterize the phases and microstructure of the catalysts, Electrochemical investigations involving cyclic voltammetry, AC impendence, were undertaken to study the resulting of PtIr nano-catalysts as the URFC oxygen side. By XRD and TEM results show that the various components of the particle size of about 2 nm in spherical structure. The cyclic voltammetry results indicated that the catalyst composition to Pt50Ir50 are better than the other components of the catalyst. AC impedance analysis shows that the impedance value of the catalyst is reduced with the increase of Pt composition. However, in the water electrolysis test the composition of Pt20Ir80 was best in the other composition. Summary the fuel cell and water electrolysis efficiency, the Pt50Ir50 composition has maximum fuel cell efficiency of 47% water electrolysis efficiency of 82%.