| Summary: | 碩士 === 大同大學 === 材料工程學系(所) === 99 === 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. In this thesis, we prepared Au-Pd and Pd-based alloy catalysts supported on multi-walled carbon nanotubes (MWCNTs). Their structures, morphologies, characterization and electrocatalytic properties for formic acid oxidation was investigated. The main results obtained are as follows：
In this study, bimetal solid solution and metal oxide modified catalyst supports, to look forward to enhance the catalytic properties of catalyst. In the study also confirmed the formation of bimetallic solid solutions help to improve the catalyst properties, and adding metal oxide materials can have different performance.
In the course of the study, for the catalyst synthesis, we look forward to adding cerium oxide catalyst can have more excellent features. The structures of nano hybrid catalysts are analyzed by X-ray diffraction (XRD) patterns. Thermogravimetry Analyzer (TGA) is used to determine the contents of metal catalyst in the nano hybrid materials. Field-emission scanning electron microscope (FESEM) and high resolution transmission electron microscope (HRTEM) are applied to observe the morphologies, BET surface area analyzer to evaluate the materials properties, TPD experiment is carried out to examine the characteristics of the catalysts. In the electrochemical oxidation experiment, cyclic voltammetry analyze the redox properties of catalyst material in acid electrolyte. CO oxidation tests will be executed to examine the catalytic activity of catalysts to study the reaction mechanisms of catalysts that can be interpreted the poison effects on the catalysts in application of fuel cell.
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