新型光化学电池高活性铂电极的研究

Study on High Activity Platinum Electrode of a New Type Photoelectrochemical Cell

应用循环伏安法，在导电玻璃表面沉积微量铂，制备新型光电化学电池的高比表面高洁性对电极所获得的电极比表面最高达371m2·g-1;同时发现，该电极对的质量交换电流密度随铂沉积量的增加而减小，而相对于宏观面积的交换电流密度几乎没有变化，因此，在实验可控制的限度内。

By using cyclic voltage method, nano-structured platinum was electrochemically deposited on the surface of conducting glass sheet, forming a high specific surface, high activityplatinum electrode for the new type photoelectrochemical cell. The highest specific surface of platinum is 37 m2·g-1 in our work. The mass exchange current of such an electrode in I-3/I-electrolyte decreases with the increasing of the deposition amount of platinum, but the exchangecurrent density almost does not change. So, in the region which could be controlled, the highactivity electrode can be formed by using very small amount of platinum.