甲醇在Pt-Sn/GC上的电催化氧化

The preparation for Pt and Pt-Sn modified Glassy Carbon Electrode by Cyclic voltammerty method was studied in methanol solution.The results indicated that the catalysis effect of Pt-Sn/GC on the onidation of methanol was best when it made by 4∶1 of H2PtCl6 and SnCl4 solution.And the catalysis activation was also changed with the Pt-Sn quantity and the temperature.The reaction mechanism and parameter of kinetics were detected by different scan rates.

Pt、Sn催化剂的电化学制备及催化性能研究

采用循环伏安法制备了Pt-Sn/GC电极,并用电化学方法研究了Pt-Sn/GC电极对乙醇的电催化氧化。实验结果表明:乙醇在Pt/GC电极和Pt-Sn/GC电极上均能自发氧化解离,产生强吸附中间体COad,而Sn的加入降低了COad在电极表面的吸附量和覆盖度,抑制了乙醇的自发氧化解离,提高了催化剂的活性;与Pt/GC电极相比,乙醇在Pt-Sn/GC电极上的起始氧化电位负移80mV,正向扫描氧化峰电位负移60mV,电流增大1倍。当沉积量为100r时,Pt-Sn/GC电极对乙醇的电催化活性最高。