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

Chinese Science Bulletin 2005年第18期50卷 1995-1998页

作者： fan youjun zhou zhiyou fan chunjie zhen chunhua chen shengpei sun shigang State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry Xiamen University Xiamen 361005 China

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, *** 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

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