表面增强拉曼光谱研究吸附电位对CO在Pt电极上氧化行为的影响

CORC > 厦门大学 > 2015年第21卷

	表面增强拉曼光谱研究吸附电位对CO在Pt电极上氧化行为的影响; Effect of Adsorption Potential on CO Oxidation at Au@Pt Nanoparticles Electrodes, A Surface Enhanced Raman Spectroscopic Study
	张普 ; 卫怡 ; 郑勇力 ; 陈艳霞 ; 田中群 ; ZHANG Pu ; WEI Yi ; ZHENG Yong-li ; CHEN Yan-xia ; TIAN Zhong-qun
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract10169.shtml
	2015-08-28
关键词	CO氧化氧化前峰表面增强拉曼 CO oxidation pre-peak surface enhanced Raman spectroscopy
英文摘要	预吸附电势对CO在Pt上的氧化行为有重要影响. 在电势低于0.3 V（vs. RHE）下，预吸附的CO单层在Pt电极上0.4 V就开始氧化，并会在0.6 V左右出现1个较小的氧化峰，即所谓的“氧化前峰”，而在双电层电位区间饱和吸附的CO只有当电势正于0.6 V才氧化; The adsorption/oxidation of CO on the 55 nm Au@0.7 nm Pt nanoparticles electrode in both potentiodynamic and potentiostatic modes were investigated by surface enhanced Raman spectroscopy in a thin layer electrochemical flow cell under controlled mass transport, with the aim of clarifying the origin CO oxidation at lower electrode potentials (in current pre-wave region of corresponding cyclic voltammograms). Our results demonstrated that the CO oxidation kinetics differed significantly from the three kinds of different CO adsorption history, with almost no CO oxidation current in the pre-peak potential region after 0.35 VRHE CO adsorption with or without subsequent holding the potential at 0.06 VRHE for 30 min, compared to the significant CO oxidation current at lower potentials in both cyclic voltammograms and potentiostatic current transients after CO adsorption at 0.06 VRHE. In contrast, at the same reaction potential in the pre-wave region both during linear potential sweep and potential step experiments, differences in Raman spectra of saturated CO adlayer with CO adsorption potential of 0.06 VRHE and 0.35 VRHE were negligible. Possible origins for the effect of pre-adsorption potential on CO oxidation kinetics are discussed.; 国家重大科学仪器设备开发专项（No. 2011YQ03012416）资助; 作者联系地址：1. 中国科技大学化学物理系合肥微尺度物质科学国家实验室（筹），安徽合肥 230026；2. 厦门大学化学化工学院固体表面物理国家重点实验室，福建厦门 361005; Author's Address: 1. Hefei National Laboratory for Physical Science at Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China; 2. State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 通讯作者E-mail：yachen@ustc.edu.cn
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dx.doi.org/10.13208/j.electrochem.150391]
专题	2015年第21卷
推荐引用方式 GB/T 7714	张普,卫怡,郑勇力,等. 表面增强拉曼光谱研究吸附电位对CO在Pt电极上氧化行为的影响, Effect of Adsorption Potential on CO Oxidation at Au@Pt Nanoparticles Electrodes, A Surface Enhanced Raman Spectroscopic Study[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract10169.shtml,2015.
APA	张普.,卫怡.,郑勇力.,陈艳霞.,田中群.,...&TIAN Zhong-qun.(2015).表面增强拉曼光谱研究吸附电位对CO在Pt电极上氧化行为的影响.http://electrochem.xmu.edu.cn/CN/abstract/abstract10169.shtml.
MLA	张普,et al."表面增强拉曼光谱研究吸附电位对CO在Pt电极上氧化行为的影响".http://electrochem.xmu.edu.cn/CN/abstract/abstract10169.shtml (2015).