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甲酸在Pt-Ru/GC电极上氧化的SERS研究
Authors
丁月敏
任斌
+6 more
周海辉
张兵
杨熊元
田中群
钟起玲
黄芃
Publication date
15 March 2006
Publisher
Abstract
采用循环伏安(CV)法、计时电流法和电化学原位表面增强拉曼散射光谱(SERS)技术研究了甲酸在Pt-Ru/GC电极上的氧化行为,发现甲酸在Pt-Ru/GC电极上与在粗糙Pt电极上一样,也能自发解离出强吸附中间体CO和活性中间体—COO-.从分子水平证实钌的加入有利于提高电极对甲酸的电催化氧化活性,当镀液中Pt:Ru的摩尔比从10∶1变化到1∶1,CO的氧化峰电位从0.41V负移至0.35V,约负移了60mV.Pt-Ru/GC(1∶1)电极与粗糙Pt电极相比,CO在电极表面氧化完毕的电位亦负移了约200mV.该研究结果表明,电化学原位表面增强拉曼散射光谱技术可望成为研究电催化反应机理的普适谱学工具
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Last time updated on 16/06/2016