In situ time-resolved FTIRS study of adsorption and oxidation of ethylene glycol on Pt(100) electrode  

作　　者：FAN Youjun ZHOU Zhiyou FAN Chunjie ZHEN Chunhua CHEN Shengpei SUN Shigang 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, China

出　　处：《Chinese Science Bulletin》2005年第18期1995-1998,共4页

基　　金：This work was supported by the National Natural Science Foundation of China(Gran:Nos.20373059 and 90206039);the“973"Program(Grant No.2002CB211804).

摘　　要：Adsorption and oxidation of ethylene glyco(EG) on Pt(100) electrode were studied by in situ timeresolved FTIRS (TRFTIRS). The TRFTIR spectra recordedat 0.10 V illustrate that an IR band appears near 2050 cm?at t > 5 s, corresponding to linearly bonded CO formed indissociative adsorption of EG. The TRFTIR results haveconfirmed also that CO species are distributed uniformly onPt(100) surface. Another band appears near 2342 cm?1 at > 70 s, associating with IR absorption of CO2 produced inthe direct oxidation of EG. With the increase of electrodepotential, the direct oxidation of EG becomes gradually themain reaction. When the potential is above 0.40 V, the oxidation of EG occurs mainly via the reactive intermediates, i.especies containing –COOH determined by in situ TRFTIRS.Adsorption and oxidation of ethylene glycol （EG） on Pt（100） electrode were studied by in situ timeresolved FTIRS （TRFTIRS）. The TRFTIR spectra recorded at 0.10 V illustrate that an IR band appears near 2050 cm^-1 at t 〉 5 s, corresponding to linearly bonded CO formed in dissociative adsorption of EG. The TRFTIR results have confirmed also that CO species are distributed uniformly on Pt（100） surface. Another band appears near 2342 cm^-1 at t 〉 70 s, associating with IR absorption of CO2 produced in the direct oxidation of EG. With the increase of electrode potential, the direct oxidation of EG becomes gradually the main reaction： When the potential is above 0.40 V, the oxidation of EG occurs mainly via the reactive intermediates, i.e. species containing -COOH determined by in situ TRFTIRS.

关 键 词：乙烯乙二醇 FTIRS 吸附理论 电极 分离氧化 

分 类 号：O646.54[理学—物理化学]