甲醛在多孔玻碳电极上行为的透射光谱现场电化学研究

In-Situ UV-Vis Penetrance Spectrum of Electrochemistry Study Behavior of HCHO on Electrode of RVC

本文在多孔玻态碳为研究电极的三电极透光薄层电解池上采用紫外可见光谱现场电化学技术,研究了HCHO在硫酸介质中的电化学行为。实验结果表明,HCHO在电极表面的吸附行为和电势正扫大于0.6伏后发生了第一级氧化反应;电势正扫大于0.9伏后发生了第二级氧化反应;电势反扫到0.4伏后,发生了HCHO不可逆氧化反应吸附中间物的氧化。从光谱数据表明,这段范围内氧化产物都为HCOOH。

A preliminary study of HCHO in H_2SO_2 on the electrode of RVC by useing of in-situ uv-vis penetrance spectro-electrochmical method has been carried out The results show that HCHO is adsorbed on the electrode surface and it occurs at the first-order anodic oxidatio reactionn when the potential is more than 0.6V, and at the second-order anodic oxidation reaction when the potential is more than 0.9V. When the potential is returned to 0.4V, HCHO occured irreversible oxidation reation of adsorptive intermediate. It is proved that all oxide species were HCOOH by the spectral data within. the potential range.