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研究生:王承鋐
研究生(外文):Wang, Cheng-Hong
論文名稱:利用奈米碳管與電化學沉積方法製備直接甲醇燃料電池陰極觸媒
論文名稱(外文):Preparation of multi-walled CNTs supported Cathodic catalyst for Direct Methanol Fuel Cell
指導教授:蔡春鴻蔡春鴻引用關係葉宗洸葉宗洸引用關係
指導教授(外文):Tsai, Chuen-HorngYeh, Tsung-Kuang
學位類別:碩士
校院名稱:國立清華大學
系所名稱:工程與系統科學系
學門:工程學門
學類:核子工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:68
中文關鍵詞:直接甲醇燃料電池氧氣還原反應電鍍奈米碳管
外文關鍵詞:DMFCORRelectrodepositionCNT
相關次數:
  • 被引用被引用:0
  • 點閱點閱:264
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  • 下載下載:26
  • 收藏至我的研究室書目清單書目收藏:0
目前直接甲醇燃料電池的發展有很多方面的瓶頸,其中包括陽極觸媒催化效能的提升和毒化現象、高分子薄膜甲醇穿透問題和陰極還原反應過電位問題等。本研究目的是研究將在碳布上直接成長奈米碳管作為奈米觸媒承載之技術,應用於陰極觸媒層以改善陰極氧氣還原反應的效能,並研究添加過渡金屬與鉑觸媒形成鉑二元合金觸媒,以優化陰極反應之動力路徑,減少過氧化氫的形成。
利用電化學方法以脈衝方式電鍍純鉑和鉑合金觸媒於自備奈米碳管碳載體,其直接成長於氣體擴散層有助於增加觸媒沉積量和反應三相區,得到其純鉑觸媒平均粒徑約為5nm;鉑鎳合金觸媒平均粒徑則小於3nm,經由自製半電池測試模組發現,鉑鎳合金有助於提升陰極氧氣還原電流。透過即時監測全電池陰陽極極化電位和分電極電化學阻抗圖譜並加以等效電路模擬分析,可以判斷觸媒催化反應電荷轉移阻抗以及極化現象。我們藉此觀察到直接成成奈米碳管於碳布效果等同於添加微孔層,其具有增加陰極電極緻密性並降低Werburg阻抗行為,改善陰極極化情形,確實提升商用碳布所製備之全電池效能近35%。使用二元合金觸媒電極所製備之全電池,改善鉑觸媒氧氣還原活性,降低陰極的極化情形以及反應電荷轉移阻抗,得到最高的電池功率密度約為41mW/cm2,然而,二元合金觸媒改善純鉑觸媒氧氣還原效能之因仍有待商確。
摘要
致謝
主目錄
圖目錄
表目錄
第一章 緒論
第二章 文獻回顧
第三章 實驗方法
第四章 結果與討論
第五章 結論
第六章 未來工作
第七章 參考文獻
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