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利用循环伏安法研究了氢钼青铜在铂电极上的修饰作用和修饰铂电极在c(H2 SO4 ) =0 5mol/L溶液中对甲醇的催化作用。研究结果表明 :铂电极因钼酸盐的还原和钼青铜的氧化而得到修饰 ,低电位范围内修饰铂电极对甲醇的氧化有催化作用 ,催化氧化电流是未修饰电极上的1 6倍。酸性条件下 ,含高价态钼的钼青铜不稳定 ,会不断溶解对铂失去修饰作用 ,对甲醇的氧化效果与未修饰铂电极上的效果相同 ;而低电位时 ,钼青铜修饰铂电极则相对稳定
Cyclic voltammetry was used to study the modification of hydrogenated molybdenum bronze on platinum electrode and the catalysis of the modified platinum electrode on methanol in c (H2 SO4) = 0 5 mol / L solution. The results showed that the platinum electrode was modified by the reduction of molybdate and the oxidation of molybdenum bronze. The platinum electrode in the low potential range catalyzed the oxidation of methanol, and the oxidation current was 16 times higher than the unmodified electrode. Under acidic conditions, molybdenum bronze containing high-valent molybdenum is unstable and will continuously dissolve and lose the modification effect on platinum, and the effect on the oxidation of methanol is the same as that on the unmodified platinum electrode; at the low potential, the molybdenum bronze modified platinum electrode is relatively stable