2009-08-012024-05-15https://scholars.lib.ntu.edu.tw/handle/123456789/665653摘要：因應替代性能源的大量需求，世界各國無不盡力研發設計材料與設備來利用大自然乾淨且充沛的能量資源，如氫氣、太陽能等。本研究計畫將會利用本團隊之前製備的垂直性奈米中孔洞二氧化鈦 (Journal of the American Chemical Society, 2006, 128, 4544) 及白金薄膜 (Chemical Communciations, 2008, 2888) 此兩種材料在能量轉換裝置上，分別為染料敏化太陽能電池 (dye-sensitized solar cells ; DSSCs) 以及高分子電解質燃料電池 (polymer electrolyte fuel cells ; PEFCs)。 DSSCs應用方面，由於TiO2獨特的垂直奈米孔洞結構，預期由本實驗室合成的TiO2電極所製成的DSSCs可有效提升效率。DSSCs領域中面臨的挑戰之一是為在染料分子吸收太陽光之後會產生電子-電洞對的再結合 (re-combination of electron-hole pairs)，因而降低其工作效率。因此增加TiO2電極與染料分子的接觸面積是極為重要的一環。本計畫所使用的解決方法是，在導電基板上製備出具有垂直且連續的奈米孔道TiO2薄膜，使染料分子可以經由奈米孔洞滲透到整個TiO2電極。 關於PEFCs的應用，希望藉由本實驗室開發出的Pt電極，進而幫助解決在燃料電池中尚未明瞭的問題：即在PEFCs中，電極真實有效的表面積為何以及此面積影響PEFCs效率的程度。對於闡明此方面的爭論，沒有Pt顆粒聚集的Pt電極是迫切需要的。本實驗室之前的研究當中發現，相較於傳統Pt電極，具備高規則與垂直奈米孔洞的Pt電極擁有較高的電流密度，即代表著可增強燃料電池中的觸媒活性。除此優異的結果之外，我們亦瞭解到本團隊所開發出來的Pt電極上並無Pt奈米粒子聚集，相較於傳統電極更適合解決“電極真實有效的表面積為何以及此面積影響PEFCs效率的程度“等方面的問題。本計畫為一項結合基礎研究(由科學角度)及實際應用(由科技角度)的研究工作。 <br> Abstract: The high demand for alternative energy sources has generated a worldwide effort to prepare materials and devices designed to harvest clean and abundant energy resources such as hydrogen gas and sunlight. This proposal focuses on the utilization of our previously fabricated perpendicular nanoporous titania (Journal of the American Chemical Society, 2006, 128, 4544) and platinum thin films (Chemical Communciations, 2008, 2888) for applications of energy conversions including dye-sensitized solar cells (DSSCs) and polymer electrolyte fuel cells (PEFCs), respectively. In the application of DSSCs, we expect the DSSCs made by our TiO2 electrode (as an anode material) will exhibit enhanced efficiency because of the unique perpendicular nanoporous configuration in the TiO2 electrode. One of the challenges in the field of DSSCs is to inhibit the re-combination of electron-hole pairs that are generated from dye molecules after irradiation of sunlight. Therefore, increasing the contact area between dye molecules and TiO2 electrode is a crucial point. Our strategy is to synthesize crystalline TiO2 films with perpendicular and continuous nanopores on conducting substrates so that dye molecules can penetrate throughout the whole TiO2 electrode through the nanopores. In the application of PEFCs, we expect the PEFCs made by our Pt electrode will clarify some unsolved problems, i.e. what is the real effective surface area in the electrodes of the PEFCs and does such surface area affect the efficiency of the PEFCs. It has been highly demanded that a Pt electrode without aggregation of Pt nanoparticles can be created to solve this dispute. In our previous study, our highly ordered and perpendicular nanoporous Pt electrode has shown increased current density than conventional Pt electrode, indicating an enhanced catalytic activity of the fuel cells. In addition to this outstanding result, we also realized that our Pt electrode without any aggregation of Pt nanoparticles has advantage over conventional Pt electrodes for the help of solving this problem. This research work is essential in both fundamental study (from a scientific view) and practical application (from a technological view).中孔洞二氧化鈦薄膜中孔洞白金薄膜染料敏化太陽能電池高分子電解質燃料電池界面活性劑的自組裝特性電鍍Mesoporous titania thin filmsMesoporous Pt thin filmsPerpendicular nanoporesDye-sensitized solar cellsPolymer electrolyte fuel cellsElectrodeposition