研究生: |
林亮佑 Lin, Liang You |
---|---|
論文名稱: |
三維結構氧化石墨烯承載高效能白金觸媒-應用於直接甲醇燃料電池 High Efficient Pt Catalyst Decorated Three Dimensional Graphene Oxide for Micro DMFCs |
指導教授: |
曾繁根
Tseng, Fan Gang |
口試委員: |
薛康琳
葉宗洸 |
學位類別: |
碩士 Master |
系所名稱: |
原子科學院 - 工程與系統科學系 Department of Engineering and System Science |
論文出版年: | 2015 |
畢業學年度: | 103 |
語文別: | 中文 |
論文頁數: | 62 |
中文關鍵詞: | 燃料電池 、水熱法 、白金觸媒 、石墨烯 |
外文關鍵詞: | Fuel Cell, Hydrothermal Synthesis, Platinum Catalyst, Graphene |
相關次數: | 點閱:2 下載:0 |
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本篇論文以水熱反應法,以一步還原成功還原出具有高比表面積、高電子傳導率之三維結構氧化石墨烯(reduced Graphene Oxide, rGO)。利用本實驗室自製之開方式還原系統,沉積奈米顆粒於前述碳材之上,以提高觸媒承載量,利用石墨烯之材料特性提高白金觸媒高承載表面積,亦可提高觸媒分散性。應用於直接甲醇燃料電池中做為高效能、高反應面積、低成本之白金觸媒或多元材料觸媒。應用於高效能直接甲醇反應式燃料電池之觸媒載體。
本實驗以水熱法和官能基接合兩種方式,其中水熱法將氧化石墨烯(Graphene Oxide, GO)和碳布(carbon cloth, CC)接合。成功同時一步還原白金顆粒和氧化石墨烯成為一多孔結構觸媒載體,再沉積白金顆粒以提高觸媒總體效能。從其半電池循環伏安法性質可看出,白金氧化峰電流密度以達到286 mA/cm2,氫離子吸脫附反應表面積為32.9 mC/cm2,其片電阻約為1.1Ω∙cm,相較於不使用石墨烯之碳布觸媒(Pt/CC)之效能提升約為2倍。在70℃之最佳全電池功率密度約有52mW/cm2,電流密度約為120mA/cm2。未來期望利用氫氣將PtrGO電極進行熱退火,以提升電極導電性,進而提升整體全電池效能。
官能基接合部分,本實驗以1,12-diaminododecane接合GO/CC和CNT/CC兩種電極。並沉積奈米白金顆粒製備Pt/GO/CC和Pt/CNT/CC。從循環伏安法的分析中可看出,相較於不處理的Pt/CC電極,此兩種電極的白金氧化峰並無明顯的提升,主因為GO和CNT接貼合在碳布表面上,無助於觸媒分散性的提升。
In this paper, The Graphene Oxide and the Pt particles were successfully reduced into three-dimensional expansion reduced Graphene Oxide(PtrGO) by the one step Hydrothermal synthesis method at 180℃ as the anode electrode for micro Direct Methanol Fuel Cells (μDMFC). For the higher performance of the PtrGO. The electrode was operated into the Homemade Open-loop reduced system (OLRS) for reducing high performance Pt particles as the anode electrode(Pt/PtrGO). The best fuel cell performance of Pt/PtrGO was 55 mW/cm2 for the power density and 120 mA/cm2 for the current density. For further experiment, the H2 annealing for the PtrGO should be operated to improve the conductivity.
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