The results indicate that HCHO has a strong influence on the anodic behavior of both p-Si and n-Si electrodes in alkaline solutions. A reduction current of HCHO on an n-Si ( 100) electrode was observed in the dark due to the conduction band electron. 实验结果表明,甲醛不仅影响p和n型半导体电极在碱性溶液中的阳极氧化峰电流,而且在负电位区能在Si(100)电极上发生还原。