吸附态和溶液相CO在Pt(110)电极上氧化过程的CV和in situ FTIRS 研究; Studies of oxidation Processes of Adsorbed and Solution CO on Pt(110) Electrode by Cyclic Voltammetry and in situ FTIRS | |
田莉 ; 李君涛 ; 叶进裕 ; 甄春花 ; 孙世刚 | |
2010-08 | |
关键词 | Pt(110)单晶电极 CO 原位FTIR反射光谱 in situ FTIR spectroscopy |
英文摘要 | 通讯作者,Tel:(86-592)2181081, E-mail:sgsun@xmu.edu.cn; [中文文摘]应用电化学原位傅里叶变换红外反射光谱(in situ FTIRS)研究了酸性介质中Pt(110)单晶电极上吸附态CO(COad)和溶液相CO(COsol)的氧化过程.循环伏安测试表明,COsol氧化的峰电位比COad氧化的正移了168mV,其峰电流密度为后者的6.7倍.电化学原位红外光谱检测到CO主要生成线型的吸附态物种(COL),均匀分布在Pt(110)表面上.当溶液中不存在CO时,COL仅在电位高于0.15V才发生氧化.而且,该谱峰在其稳定吸附的电位区间内随电位增加蓝移,Stark系数为30cm-1·V-1;在COL发生氧化的电位区间,其谱峰强度随电位增加减小、峰位红移,线性变化率为-56cm-1·V-1.溶液中饱和CO时,原位红外光谱在-0.05V即可检测到CO2的存在,显示COL起始氧化的电位提前了200mV;电位高于-0.05V,该谱峰即发生红移,对应的线性变化率为-26.5cm-1·V-1.[英文文摘]The oxidation processes of adsorbed CO (COad) and solution phase CO (COsol) on Pt(110) electrode were investigated by cyclic voltammetry and in-situ FTIR spectroscopy. It has revealed that in comparison with COad on Pt(110) in a CO-free solution,the oxidation current peak of COsol in a CO-saturated solution is positively shifted ca. 168 mV,and the peak current density has been increased by 6.70 times. Linear adsorbed CO (COL)is determined by in-situ FTIR spectroscopy as the main species,which is uniformly distributed on Pt (110) surface. In a CO-free solution, the onset potential of COL is measured by in-situ FTIRS ca.0. 15 V; the COL band is blue-shifted with the increase of electrode potential in the potential range where COL is stable,yielding a Stark tuning rate 30 cm - 1·V - 1 ; when the COL is oxidized at E > 0.15 V,the COL band is red-shifted at a rate of - 56 cm - 1·V - 1 . In the case of CO-saturated solution, the CO2 band could be appeared in the in-situ FTIR spectrum recorded at - 0.05 V,demonstrating that the onset potential of COL oxidation is negatively shifted ca. 200mV in comparison with Pt(110) in a CO-free solution; the COL band is immediately red-shifted with a rate of-26.5 cm-1·V-1 when the potential is above -0.5 V.; 国家自然科学基金项目(20833005,20828005,20921120405)资助 |
语种 | 中文 |
出版者 | 《电化学》编辑部 |
内容类型 | 期刊论文 |
源URL | [http://dspace.xmu.edu.cn/handle/2288/2014] ![]() |
专题 | 化学化工-已发表论文 |
推荐引用方式 GB/T 7714 | 田莉,李君涛,叶进裕,等. 吸附态和溶液相CO在Pt(110)电极上氧化过程的CV和in situ FTIRS 研究, Studies of oxidation Processes of Adsorbed and Solution CO on Pt(110) Electrode by Cyclic Voltammetry and in situ FTIRS[J],2010. |
APA | 田莉,李君涛,叶进裕,甄春花,&孙世刚.(2010).吸附态和溶液相CO在Pt(110)电极上氧化过程的CV和in situ FTIRS 研究.. |
MLA | 田莉,et al."吸附态和溶液相CO在Pt(110)电极上氧化过程的CV和in situ FTIRS 研究".(2010). |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论