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用MSCV法研究了Pt催化剂作用下,碳材料在pH 0.3～11.8范围内的阳极腐蚀.Pt催化剂明显加速了活性炭及乙炔黑的腐蚀速度,使这两种电极上CO_2开始析出的电位φ_s明显负移,以致均负于φ_(O_2/H_2O).因此两种碳电极无论作为阳极还是氧阴极工作时均会被腐蚀.Pt对乙炔黑的催化活性明显强于活性炭.对于活性炭,Pt并不改变CO_2的φ_s-pH及η_s-pH曲线的形状(η_s-CO_2开始析出的超电势)(即无论有无Pt它们均为折点在pH～7的折线).然而乙炔黑的情况更为复杂.Pt使CO_2的φ_s-pH及η_s-pH形状从折线变为直线;在CO_2的I_(M-φ)曲线上出现两个波.它们似与乙炔黑上两种表面氧化物相对应.
The anodic corrosion of carbon materials was investigated by MSCV method in the pH range of 0.3 ~ 11.8, and the corrosion rate of activated carbon and acetylene black was significantly accelerated by Pt catalyst, the potential φ_s of precipitated CO 2 on both electrodes was obviously negative So both of them are negative to φ_ (O_2 / H_2O) .Therefore, both carbon electrodes will be corroded when they work as anodes or oxygen cathodes.The catalytic activity of Pt on acetylene black is obviously stronger than that of activated carbon.For activated carbon, Pt does not change The shape of the φ_s-pH and η_s-pH curves for CO_2 (overpotential for η_s-CO_2 onset) (ie, the breakpoint with breakpoints at pH ~ 7 with or without Pt.) However, the case of acetylene black is more complex. Pt changed the shape of φ_s-pH and η_s-pH of CO_2 from a broken line to a straight line, and two waves appeared on the I_ (M-φ) curve of CO_2, which corresponded to the two surface oxides on acetylene black.