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研究生: 林宏澤
Lin, Hong-Ze
論文名稱: 導電性高分子-無機複合修飾電極之電化學電容及甲醇催化能力之研究
Studies on the capacitance and electrocatalytic properties toward methanol oxidation of the modified composite electrodes consisting of conducting polymers and inorganic material
指導教授: 溫添進
Wen, Ten-Chin
學位類別: 碩士
Master
系所名稱: 工學院 - 化學工程學系
Department of Chemical Engineering
論文出版年: 2006
畢業學年度: 94
語文別: 中文
論文頁數: 99
中文關鍵詞: 電容白金
外文關鍵詞: Pt, capacitors, Ru
相關次數: 點閱:70下載:1
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  • 摘要
    論文第一部份主要是探討導電性高分子-無機複合修飾電極之電化學電容行為。利用電化學循環伏安法,將含水釕氧化物粒子沈積於導電聚(亞乙基二氧硫代酚)-聚(磺酸苯乙烯)上,製備成導電性高分子-無機複合修飾電極。含水釕氧化物的沈積量可藉由循環圈數來控制。掃描式電子顯微鏡觀測發現,含水釕氧化物粒子是均勻的分散在多孔狀的導電性高分子上。拉曼光譜進一步確定含水釕氧化物粒子是嵌於聚(亞乙基二氧硫代酚)-聚(磺酸苯乙烯)內部。循環伏安及充放電結果顯示,隨著含水釕氧化物沈積量的增加,電極的比電容量亦隨之增加。本實驗所得的最大比電容量為653 F/g。
    論文第二部份是探討導電性高分子-無機複合修飾電極之甲醇催化能力。導電聚(2,5二甲氧苯胺) )-聚(磺酸苯乙烯)-白金-釕修飾複合電極之製備方式是將2,5二甲氧苯胺-聚磺酸苯乙烯單體溶液與特定比例的白金以及釕金屬前驅鹽類混合,並照射254 nm的紫外光以進行光聚合反應。複合電極之材料及特性分析藉由穿透式電子顯微鏡、X光繞射圖譜、紫外光-可見光光譜、化學分析電子光譜、和傅利葉紅外線光譜。利用循環伏安掃描來測試觸媒的催化能力。當複合電極中白金和釕的體積比為8:2時,具有最佳的甲醇氧化能力。實驗結果顯示,光聚合法提供一個簡易的方式來製備單金屬以及雙金屬複合修飾電極。該項製程將有助於未來商業化大量生產。

    Abstract
    Hydrous RuO2 particles were electrochemically loaded into poly(3,4-ethylenedioxythiophene) doped poly(styrene sulfonic acid), PEDOT-PSS, matrix by employing various potential cycles in cyclic voltammetry and to fabricate the PEDOT-PSS- RuO2 electrode. The amount of hydrous RuO2 particles loaded into the PEDOT-PSS matrix was easily controlled by varying the number of potential cycles. Scanning electron microscopy photographs reveal a homogeneous distribution of hydrous RuO2 particles in the porous structure of PEDOT-PSS matrix. Raman spectrum confirms the incorporation of hydrate RuO2 into PEDOT-PSS matrix. Chronopotentiometry and cyclic voltammetry were employed in 0.5 M H2SO4 to evaluate the capacitor properties. Specific capacitance values were determined by chronoamperometry. An increasing trend in specific capacitance with loaded amount of hydrous RuO2 particles in PEDOT-PSS was noticed. A maximum specific capacitance of 653 F/g was achieved.
    Polymer supported PtRu electrodes were prepared by mixing Pt and Ru precursors in 2,5-dimethoxyaniline-Polystyrenesulphonate (DMA-PSS) solution,followed by the reduction of the metals ions with 254nm UV light. The samples were characterized by transmission electron microscopy (TEM)、X-ray diffraction (XRD)、UV-visible adsorption spectroscopy、X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) measurements. The catalytic performance of the samples was evaluated by methanol oxidation. Pt80Ru20 (volume ratio) nanoparticles are the best electrocatalyst for methanol oxidation. All these results show that the photoinduced method can be used to produce metallic or bimetallic nanoparticles in a convenient way. This approach can be easily used to scaled-up in the industry.

    目錄 中文摘要………………………………………………………..i 英文摘要………………………………………………………iii 致謝…………………………………………………………… v 目錄……………………………………………………………vi 圖目錄………………………………………………………….x 表目錄…………………………………………………….…..xv 第一章 序論…………………………………………………………..1 1-1 導電性高分子………………………………………………..1 1-1-1 導電性高分子之發展………………………………...1 1-1-2 導電性高分子的分類………………………………...2 1-1-3 導電機制……………………..…………..…….……..3 1-1-4 導電性高分子之合成方法…….……………………..4 1-1-4-1 化學聚合…………..……………………………..4 1-1-4-2 電化學聚合……………..………………………..6 1-1-5 導電性高分子之應用..………….……………………7 1-2 金屬氧化物電極…………………………………………….8 1-2-1 電極材料的選擇……………..…………..…….……..8 1-2-2 影響氧化物電極特性的因素……………………….10 1-2-3 氧化物電極的發展與應用…...………….…………..11 1-3 導電性高分子-無機複合電極材料………………………...12 1-3-1 複合電極製備方式...…………...………….………..12 1-3-2 複合電極的發展與應用……..….…….………….....13 1-4 研究動機與方向………...……………….…….……………20 第二章 含水釕氧化物-導電聚(亞乙基二氧硫代酚)-聚(磺酸苯乙烯)修飾電極於電化學電容器之特性探討…...27 2-1 前言…………………………………..……………………...27 2-2 實驗部分…………………………..………………………...28 2-2-1 藥品與裝置..………….……………………..………28 2-2-2 電極基材的前處理…..……………………….……..29 2-2-3 複合電極製備…..….………………...……….……..30 2-2-4 電化學測試..………………………..…...……….….30 2-2-5 材料分析..…………………………..…...……….….31 2-3 結果與討論……………………………………………...….31 2-3-1 含水釕氧化物成長行為………..…….……….…….31 2-3-2 釕氧化物表面型態…..…………….…….……...…..34 2-3-3 釕氧化物準電容影響評估……..…………….…..…35 2-4 結論…………………….……………………………………37 第三章 導電聚(2,5 甲氧苯胺)-聚(苯磺酸乙烯)-白金-釕修飾複合電極之製備及甲醇催化能力探討.................45 3-1 前言.........................................................................................45 3-2 實驗部分……………………………….……….…………...47 3-2-1 藥品與裝置….…………….………………….……..47 3-2-2 電極基材的前處理…………………………...……..48 3-2-3 複合電極製備………...………………..……………48 3-2-4 電化學測試…...…………..…………………………49 3-2-5 材料分析……...……………………..………………49 3-3 結果與討論………………………………………………….50 3-3-1 紫外光對單體聚合及前驅物還原的機制探討….…50 3-3-2 複合電極之材料分析……………………………….52 3-3-3 複合修飾電極的電化學行為探討………………….54 3-3-4 甲醇催化能力探討………………………………….55 3-3-5 複合電極於甲醇溶液下之穩定度測試…………….58 3-4 結論………………………………………..……..………….60 第四章 總結與建議……………………………………..…….89 4-1 總結………………………………………………………….89 4-2 建議………………………………………………………….90 參考文獻………………………………………………………...…….92 自述…………………………………………………………………….99

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