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	INSITU FTIRS FEATURES DURING OXYGEN-ADSORPTION AND CARBON-MONOXIDE OXIDATION AT A PLATINUM-ELECTRODE IN DILUTE ALKALINE-SOLUTIONS
	Sun, S. G. ; Chen, A. C. ; Sun SG(孙世刚)
	1992-01-24
关键词	FORMIC-ACID INFRARED-SPECTROSCOPY ADSORBED CO BISULFATE ELECTROOXIDATION ELECTROSORPTION METHANOL
英文摘要	Oxygen adsorption and CO oxidation at a Pt electrode in dilute alkaline solutions were studied using the single-potential alteration Fourier transform IR spectroscopy (SPAFTIRS) technique. The results demonstrated that the concentration of OH- in solution plays an important role in the oxidation of CO(ad) and the retention of the CO2 product of this oxidation. The band due to the CO2 asymmetrical stretch will appear in spectra only when OH- species near the Pt surface in the thin layer between the electrode and the IR window have reached a very low concentration. The experimental data reported here show that CO(ad) may be attacked by OH- species in solution even in the potential region of hydrogen adsorption. In a concentrated base solution the negative-going peak of the CO(ad) bipolar band corresponding to IR absorption by CO(ad) at the sample potential disappears rapidly from the spectra with increasing sample potential, and no CO2 band is observed. During oxygen adsorption and CO oxidation the FTIR spectra are dominated by a curved region between 3000 and 1700 cm-1 and a progressive increase in the intensity of a band near 1650 cm-1, which is defined as "OH- loss structure" and is due to the concentration variation of components, i.e. the loss of OH- and the production of H2O species in the thin layer.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/61730]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Sun, S. G.,Chen, A. C.,Sun SG. INSITU FTIRS FEATURES DURING OXYGEN-ADSORPTION AND CARBON-MONOXIDE OXIDATION AT A PLATINUM-ELECTRODE IN DILUTE ALKALINE-SOLUTIONS[J],1992.
APA	Sun, S. G.,Chen, A. C.,&孙世刚.(1992).INSITU FTIRS FEATURES DURING OXYGEN-ADSORPTION AND CARBON-MONOXIDE OXIDATION AT A PLATINUM-ELECTRODE IN DILUTE ALKALINE-SOLUTIONS..
MLA	Sun, S. G.,et al."INSITU FTIRS FEATURES DURING OXYGEN-ADSORPTION AND CARBON-MONOXIDE OXIDATION AT A PLATINUM-ELECTRODE IN DILUTE ALKALINE-SOLUTIONS".(1992).

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