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首页> 外文期刊>Journal of the Brazilian Chemical Society >Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method
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Ethanol electrooxidation using Ti/(RuO2)(x) Pt(1-x) electrodes prepared by the polymeric precursor method

机译：使用通过聚合前体方法制备的Ti /（RuO2）（x）Pt（1-x）电极进行乙醇电氧化

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摘要

This work describes a detailed study of the ethanol electrooxidation on Ti/(RuO2)(x)Pt(1-x) electrodes using several compositions prepared by the polymeric precursor method. The results obtained using cyclic voltammetry and chronoamperometry showed that the best composition of Ti/(RuO2)(x)Pt(1-x) electrodes for CO and ethanol oxidation processes is Ti/(RuO2)0.50Pt0.50. On this electrode composition the onset of CO and the ethanol oxidation occurred at 380 mV and 220 mV more negative than on Ti/Pt, respectively. Besides, there was an increase of 2.5-fold in the current density for ethanol electrooxidation under constant potential polarization. The Ti/(RuO2)0.50Pt0.50 electrodes produced lower amount of acetic acid compared to Ti/Pt and polycrystalline Pt electrodes using in situ HPLC spectrometric analysis. Also, a non common product from ethanol oxidation could be observed on higher RuO2 loads: ethyl acetate. Finally, the impedance data showed that Ti/(RuO2)0.50Pt0.50 electrode composition had the smallest charge transfer resistance for ethanol oxidation among those compositions investigated
机译：这项工作描述了使用几种通过聚合前体方法制备的组合物对乙醇在Ti /（RuO2）（x）Pt（1-x）电极上进行电氧化的详细研究。使用循环伏安法和计时电流法获得的结果表明，用于CO和乙醇氧化过程的Ti /（RuO2）（x）Pt（1-x）电极的最佳组成是Ti /（RuO2）0.50Pt0.50。在该电极组合物上，CO和乙醇的氧化分别比Ti / Pt的负离子在380 mV和220 mV处发生。此外，在恒定电势极化下，乙醇电氧化的电流密度增加了2.5倍。使用原位HPLC光谱分析，与Ti / Pt和多晶Pt电极相比，Ti /（RuO2）0.50Pt0.50电极产生的乙酸量更少。同样，在较高的RuO2负载下，可以观察到乙醇氧化产生的非常规产物：乙酸乙酯。最后，阻抗数据表明，在所研究的这些成分中，Ti /（RuO2）0.50Pt0.50电极成分对乙醇氧化的电荷转移阻力最小

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