【摘要】 将Pt[111]电极分别浸在SnSO4 、Sn(SO4 )2 、SnCl4 溶液中,形成的Sn/Pt[111]修饰电极对甲醇氧化的催化效果不一样. 当浸渍溶液为Sn(SO4 )2 或SnCl4 时,在较高电势(0.8 V以上),Sn 能提高Pt[111]电极的电催化活性. 当浸渍溶液为SnSO4 时,Sn 却表现出阻碍作用.研究中还发现,吸附了Sn 的Pt[111]电极灼烧后表现出的催化活性超过浸渍形成的Sn/Pt[111]修饰电极.更多还原

【Abstract】 The voltammograms obtained on the modified Pt[111] electrodes in 0.1 mol/L H 2SO 4 and 0.2 mol/L CH 3OH are different, after immersing Pt[111] electrodes in SnSO 4, Sn(SO 4) 2, SnCl 4 solution respectively. It means that the effects of varied states of tin on methanol electro\|oxidation are different. An enhancement of activity for methanol oxidation on Pt[111] electrode modified by Sn(Ⅳ) is observed above 0.8 V vs. RHE. But there is an obstacle for methanol oxidation when the Pt[111] electrode modified by SnSO 4. After annealing Sn(Ⅱ)/Pt[111] electrode in gas\|oxygen flame for several seconds, the electrode presents the best catalytic activity.更多还原