研究生: |
蘇政一 Cheng-Yi Su |
---|---|
論文名稱: |
高效能Fe3C/FeS@C奈米結構之觸媒應用於鹼性陰離子交換膜燃料電池 The Catalyst of Fe3C/FeS@C Nanostructure Apply to Alkaline Anion Exchange Membrane Fuel Cell |
指導教授: |
王丞浩
Chen-Hao Wang |
口試委員: |
郭俞麟
Yu-Lin Kuo 洪逸明 I-Ming Hong 王冠文 Kuan-Wen Wang 陳燦耀 Tsan-Yao Chen |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2018 |
畢業學年度: | 106 |
語文別: | 中文 |
論文頁數: | 111 |
中文關鍵詞: | 氧氣還原反應 、燃料電池 、非貴重金屬觸媒 、有機金屬骨架 |
外文關鍵詞: | Oxygen reduction reaction(ORR), fuel cells, non-precious metal catalyst, Metal-Organic Frameworks(MOF) |
相關次數: | 點閱:250 下載:0 |
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氫能是目前降低人類對於石油依賴性的方法之一,而鹼性陰離子交換膜燃料電池(AAEMFC)是其中一種有效將化學能轉換成電能與熱能之綠色能源裝置,且由於白金觸媒之價格昂貴而無法被廣泛應用,因此希望發展低廉兼具高效能之非貴金屬觸媒。本研究利用有機金屬骨架-普魯士藍(PB)嵌入導電高分子(PEDOT)形成一特殊形貌,並於特定溫度下進行熱處理以提高觸媒之催化能力,接著將最佳化熱處理溫度之觸媒經過酸洗處理並再次於最佳化溫度二次燒結。實驗結果顯示,本研究最佳化觸媒FeCN-S-800-2nd具有最佳氧氣還原能力,且其電子轉移數可達3.99,已非常接近理想之電子轉移數。由於其表面的孔隙結構,且含有較多總比例之含氮官能基與Fe-Nx基團,大幅提升觸媒整體之氧氣還原能力。此外,觸媒以線性掃描伏安法(LSV)進行30000圈穩定性測試,觸媒之半波電位僅衰退27.3 mV,且於鹼性環境之全電池測試更展現124 mW/cm2之高輸出功率,顯示觸媒於鹼性環境下具有極好的穩定性與效能。
此研究利用簡易之方法製備特殊形貌且高效能之催化劑,在未來之燃料電池觸媒應用上實為一具有競爭力之選擇。
Fuel cell is one of a good choice of alternative energy due to its main water as the product. Non-precious metal catalysts of the oxygen reduction reaction (ORR) are extremely attractive in anion exchange membrane fuel cell AEMFC due to long stability and inexpensive cost. Here, a new concept of pyrolyzed poly(3,4-ethylene dioxythiophene) hydrate (PEDOT)-supported by Prussian blue (PB-PEDOT) catalyst for the oxygen reduction reaction in AEMFC cathode shows the high catalytic performance. The PB-PEDOT was pyrolyzed at different temperature to obtain FeCN-S-X (X = 600, 800, 1000 ℃) catalysts among which FeCN-S-800 displays obviously ORR activity. After acid leaching process and second pyrolysis, the optimized electrocatalyst FeCN-S-800-2nd has more positive onset potential and also shows significant ORR performance with a direct four-electron transfer pathway for the AEMFC application. As a result, the catalyst exhibited superior ORR electrocatalytic activity and stability are attributable to the specific structure, high specific surface area, heteroatoms contribution and coordination structure.
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