Synthesis and Characterization of Palladium and Platinum Catalysts Supported on Metal Oxide Modified Multi-Walled Carbon Nanotubes

• Main Authors: Che-Lun Chang, 張哲倫
• Other Authors: Hong-Ming Lin
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/68450869093300689334

碩士 === 大同大學 === 材料工程學系(所) === 101 === Recently, direct formic acid fuel cells (DFAFCs) have attracted considerable attention. The research on anode catalysts for formic acid oxidation is crucial for the development of DFAFCs. Synthesize direct formic acid fuel cells (DFAFCs) and direct methanol fuel cells (DMFCs) are compared in this study. Their structures, morphologies, characterization and electrocatalytic properties were investigated. From the Raman Spectroscopy (RS) analyze, we can know the defect level on the materials. The structures of the resulting nano-catalyst hybrid materials are analyzed by X-ray diffraction (XRD) patterns. Thermogravimetry Analyzer (TGA) is used to determine the contents of metal catalyst in hybrid materials. Field Emission Scanning Electron microscope (FESEM) and High Resolution Transmission electron microscope (HRTEM) are applied to image the morphologies, structures, sizes and the dispersion of nano catalyst. Cyclic Voltammetry is using the to measure electrochemical oxidation reactions of catalysts under the formic acid solution and methanol solution. The results indicate the charge increase due to hydrogen adsorption/desorption and oxide formation in 20wt%Pt/[20wt%CeO2/MWCNTs] is much larger than others. Also, 20wt%Pt/[20wt%CeO2/MWCNTs] have the better electro catalytic active than those of oxides series. For Pd series, the highest of electrochemical active surface area is 20wt%Pd/[20wt%CeO2/MWCNTs], and is about 49.22 m2g-1. But, the formic acid oxidation reaches to 60th cycle, 20wt%Pd/[20wt%ZrO2/MWCNTs] have great electro-oxidation activities.