摘要
铂电极在c(K2 PtCl6) =2 .5× 10 -3 mol/L、c(Na2 MoO4 ) =0 .0 5mol/L、c(H2 SO4 ) =0 .5mol/L的溶液中 ,电位为 +1 1～ - 0 2V(vs.SCE) ,以 2 0mV/s的速度循环扫描 10min ,可制得一种Pt/HxMoO3 电极。用循环伏安和电位阶跃方法研究了在所制备电极上甲醇的氧化。实验结果表明 ,所制备电极对甲醇的氧化有催化作用 :(1)氧化电位比在Pt/Pt电极上降低 0 12 5V ;(2 )氧化电流为Pt/Pt电极的 6倍。讨论了Pt/HxMoO3 电极对甲醇氧化的催化机理。
A kind of Pt/HxMoO3 elecrtrode was prepared by cyclic scan of Pt electrode between +1.1～-0.2 V(vs.SCE) in 2.5×10-3 mol/L K2PtCl6+0.05 mol/L Na2MoO4+0.5 mol/L H2SO4 solution.Methanol oxidation on the prepared electrode was studied using cyclic voltammetry and potential step method.The results showed that (1)oxidation potential of methanol on Pt/HxMoO3 electrode was 0.125 V lower than that on Pt/Pt(0.35 V) and (2)oxidation current of methanol was 6 times as high as that on Pt/Pt(0.78 mA.cm-2).Mechanism of catalytic oxidation was discussed.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2000年第z1期107-110,共4页
Fine Chemicals
基金
广东省自然科学基金资助 !(970 3 19)
