近年來，水分解技術的提高，氫逐漸為重要的能源，而光電水分解電池可將水分解產生氫氣。本研究目的為藉由界面活性劑添加改變白金薄膜表面型態作為光電水分解電池的陰極提升水產氫效率。
本研究利用界面活性劑(SDS)自組裝模版製備奈米白金薄膜，探討製程參數如電沈積電壓、界面活性劑濃度、電沈積時間對白金薄膜表面型態與沈積速率的影響。
結果顯示：利用電沈積方法可製備出具介孔白金薄膜，經由TEM分析其介孔大小為7.5nm。本研究得到歸納三點結論: 1.電沈積電壓在-0.2V及-0.4V可製備具介孔性質的白金粒子。2.界面活性劑濃度0.1wt%增加到1wt%時，介孔尺寸由7.5nm增加至15nm。3.電壓與界面活性劑濃度大小與白金沈積速率有相關性，而低沈積速率較能製備介孔白金薄膜。
本研究在-0.4V電沈積、界面活性劑濃度為0.1wt%SDS、時間為30s時製備的白金薄膜有最大比表面積為42.1m2/g，水產氫的轉換效率為20.2%。

In recent years, hydrogen has been one of the important source of energy, and in a photovoltaic cell hydrogen is produced by water splitting. The purpose of the thesis is to make the cathode for photovoltaic cell in order to raise the efficiency of water splitting by varying surface morphology of platinum thin film.
In this thesis, nanostructure platinum thin film was prepared by utilizing surfactant assembly to investigate the effects of experimental parameters, such as electrical potential、surfactant concentration and deposition time.
The wormhole-like platinum thin film could be prepared by electrodeposition, and its size is 7.5 nm. There are three important results obtained in this study. First, the wormhole-like platinum thin film could be prepared at -0.2, and -0.4 volt. Second, the size of wormhole increases from 7.5 to 15 nm by varying 0.1 to 1 percent of surfactant concentration. Third, the wormhole -like platinum thin film could be prepared easily by slowing the deposition rate.
The highest surface area obtained is 42.1m2/g and the hydrogen conversion efficiency is 20.2% when the platinum is deposited at -0.4 volt, and the surfactant concentration of 0.1 percent. The highest symmetrical current is 112mA/cm2 as calculated by electrode kinetics.

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