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首页> 外文期刊>Chemistry: A European journal >Revealing structural effects, part II: The influence of molecular structure on the adsorption of butanol isomers on platinum
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Revealing structural effects, part II: The influence of molecular structure on the adsorption of butanol isomers on platinum

机译：揭示结构效果，第二部分：分子结构对丁醇异构体在铂上的吸附的影响

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摘要

The nature of the adsorbates formed when butanol isomers interact with platinum electrodes in a perchloric acid medium was investigated by the application of on-line differential electrochemical mass spectrometry (DEMS) and cyclic voltammetry. In this way the reactivity of the residues remaining on the electrode surface after a flow-cell experiment was established for the different molecules. It was found that the four isomers form strongly adsorbed species on the electrode, which undergo both electro-oxidation and electroreduction, depending on the potential applied at the electrode. Oxidative stripping of the adsorbates produces CO2 as the only oxidation product, whereas propane and the corresponding butane isomer are obtained on platinum in the hydrogen adsorption potential region. The yields of these hydrocarbons were found to depend strongly on the nature of the butanol isomer and on the adsorption potential. According to these results, it can be concluded that fragmentation of the butanol isomers occurs during adsorption and reduction reactions. C-4 alkene and acetyl species are proposed as the adsorbed intermediates in all cases.
机译：通过在线差分电化学质谱（DEMS）和循环伏安法的应用，研究了丁醇异构体与高氯酸介质中的铂电极相互作用时形成的吸附物的性质。以这种方式，针对不同的分子建立了在流动池实验之后残留在电极表面上的残留物的反应性。已经发现，四种异构体在电极上形成强烈吸附的物质，根据施加在电极上的电势，它们会进行电氧化和电还原。吸附物的氧化汽提产生的CO2是唯一的氧化产物，而丙烷和相应的丁烷异构体是在氢吸附势能区域的铂上获得的。发现这些烃的产率在很大程度上取决于丁醇异构体的性质和吸附潜力。根据这些结果，可以得出结论，丁醇异构体的断裂在吸附和还原反应期间发生。在所有情况下，建议使用C-4烯烃和乙酰基作为吸附中间体。

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