Sn/Pt[111]修饰电极对甲醇氧化的电催化

Sn/Pt[111]修饰电极对甲醇氧化的电催化 Electrocatalysis of Methanol Oxidation on the Pt[111] Electrodes Modified by Tin 王恒 WANG Heng 1 first-author 雷汉伟 LEI Han\|wei 1 高翠琴 GAO Cui\|qing 1 周运鸿 ZHOU Yun\|hong 1 武汉大学化学与环境科学学院,武汉,430072 武汉大学化学与环境科学学院,武汉,430072 College of Chemistry and Environment Science, Wuhan University College of Chemistry and Environment Science, Wuhan University 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. 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. 电催化 修饰电极 吸附 浸渍 Sn Pt[111] Sn Pt [111] modified electrode electrocatalysis adsorption immersion Q505 国家自然科学基金!（29773032） 1999-06-01 2021-04-01 6