本研究利用陽極氧化法製備一維高面相比TiO2奈米管陣列材料，並將Pt奈米顆粒均勻分散於TiO2奈米管陣列表面，解決TiO2本身之限制並進一步提升光電化學反應之效率與整體產氫量。在單純的TiO2奈米管陣列材料，針對陽極氧化時間和鍛燒溫度之參數條件進行TiO2奈米管陣列形貌、晶相和表面特性之探討，並利用光電化學行為推測影響因素進而得到最佳化之實驗參數。所得到面相比375 的TiO2奈米管陣列在光電化學反應下於-0.55 V vs. Ag/AgCl (相當於0 V vs. RHE)具有最大的光還原電流，從結果顯示本研究所製備的TiO2奈米管陣列材料擁有水還原特性。當Pt奈米顆粒修飾在TiO2奈米管陣列材料時，金屬與半導體的界面產生蕭特基接觸(Schottky contact)，有利於電子由TiO2轉移至Pt奈米顆粒上而增加產氫的反應，隨著Pt添加的濃度上升，電子被捕捉的位置變多，施加-0.95V時的電流變化相對於無添加時增加至10.5倍(0.17 wt%)，本研究中含有0.17 wt% Pt的Pt/TiO2奈米管陣列複合材料具有最佳的光電化學產氫反應。施加不同電壓方面，暗反應下施加-0.75 V vs. Ag/AgCl (-0.2 V vs. RHE)下開始發生產氫量顯示TNTAs及Pt/TNTAs相對於於Pt片，其產氫量是Pt片5.6倍和8.3倍，其代表本研究所製備的奈米材料對於產氫之可行性。在不同相對電極方面，在照光或暗反應下施加-0.95V vs. Ag/AgCl之電壓的電流顯示以Pt/TiO2奈米管陣列為相對電極的產氫量相對於Pt片增加，表示Pt/TiO2奈米管陣列可代替傳統的Pt片並有效提升產氫反應之速率。在長時間反應下，Pt/TiO2奈米管陣列複合材料維持光電流變化達到97 %，顯示本研究所製備的電極材料具有高穩定性。最後把電極材料置換至陽極，發現TiO2奈米管陣列材料具有高氧化特性，顯示本研究所製備的電極材料具有多功能性之用途，同時可應用於光陰極和光陽極，且有效使用光源得到高產氫量，在水裂解電池上具有相當大的優勢。

These studies represent Pt nanoparticle is well dispersed on one-dimensional high aspect ratio TiO2 nanotube arrays surface which is prepared by anodic process. Use Pt/TiO2 nanotube arrays as a photocathode and application in photoelectrochemical reaction for water reduction, to improve photoelectrocatalytic hydrogen generation. For the nature TiO2 nanotube arrays material, adjusting anodic time and calcination temperature to control morphology, crystal phase and surface characterization, and used photoelectrochemical performance to obtain optimal parameter. The optimal TiO2 nanotube arrays with aspect ratio 375 yielded a maximum photocurrent at -0.55 V vs. Ag/AgCl (0 V vs. RHE) in 0.5 M Na2SO4 solution under UV light, this results showed TiO2 nanotube arrays we prepared had a property of water reduction. Decoration of TiO2 nanotube arrays by Pt nanoparticles produced schottky contact on the interface between metal and semiconductor, this mechanism favor to electron transfer from TiO2 to Pt, and current variation on the 0.17 wt% Pt/TNTAs at -0.95 V vs. Ag/AgCl was 10.5 times higher than in TNTAs. In different counter electrode, these result showed the hydrogen production on Pt/TNTAs as a counter electrode was higher than on Pt foil, also indicate Pt/TNTAs was substituted for Pt foil to enhance hydrogen generation rate. In long term reaction, the stability of Pt/TNTAs electrodes was 97 %, it indicated that the electrode materials we prepared were highly stability. Finally, the TNTAs also had high oxidizing power for water, these results showed the multifunctional TNTAs electrode materials had high performance for water splitting, and applied for photoanode and photocathode. These materials had a potential in water splitting cell.

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