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31.
In this study, the electrochemical oxidation of acetaldehyde was investigated at activated massive DSA® electrodes in acid medium, using differential electrochemical mass spectrometry (DEMS) and high-performance liquid chromatography (HPLC). The electrodes were prepared either by platinum electrodeposition or by depositing a highly nanodispersive-supported catalyst (Pt and Pt-Ni) over electrode surfaces with a Ti/Ru0.3Ti0.7O2 nominal composition. Bulk electrolysis shows evidence of CO2 and acetic acid formation. The electrocatalytic efficiency of the electrode material was also investigated as a function of the amount of catalyst added over the DSA® electrode surface. The presence of RuO2-active sites on the DSA® substrate plays an important role in the reaction overall efficiency. The addition of platinum to DSA® enhances the oxidation of acetaldehyde to CO2. The role of the substrate on the direct activation of acetaldehyde oxidation is discussed on the basis of the direct application of the metal nanoparticle catalyst over conductive oxide surface based on Magneli phase (mixture of TinO2n−1 and other phases) from Ebonex®. 相似文献
32.
分布式能量管理系统(DEMS)状态估计分布式异步迭代算法 总被引:6,自引:0,他引:6
考虑DEMS数据信息通信延迟的不可预测性,在导出DEMS分布式状态估计可观测条件的基础上,构造了DEMS状态估计分布式异步迭代算法,得出了状态估计分布式异步迭代算法的收敛性定理,设计并实现了分布式异步迭代算法在局域网上的模拟计算,最后以IEEE-30节点系统为例对所构算法的有效性进行了验证。 相似文献
33.
T. Herranz S. García M.V. Martínez-Huerta M.A. Peña J.L.G. Fierro F. Somodi I. Borbáth K. Majrik A. Tompos S. Rojas 《International Journal of Hydrogen Energy》2012
The role of two intermetallic phases of PtSn, namely Pt3Sn (fcc phase) and PtSn (hcp phase) for the electrooxidation of CO and methanol has been evaluated. Carbon supported Pt3Sn and PtSn nanosized particles have been prepared by controlled surface reactions. The actual structure of the PtSn alloys has been evaluated and confirmed by means of XRD and HR-TEM studies which reveal the predominance of either the hcp or the fcc phase in each catalyst. The catalysts have been further characterized to identify the actual metal loading and Pt/Sn atomic ratio in order to eliminate particle size or metal loading effects on their electrocatalytic performance. The performance of the catalysts for the electrooxidation of CO and methanol has been evaluated by electrochemical techniques along with in situ techniques such as electrochemical coupled Infrared Reflection Absorption Spectroscopy (EC-IRAS) and differential electrochemical mass spectrometry (DEMS). Altogether, the results presented in this work reveal that Pt3Sn fcc is more active than PtSn hcp for the electrooxidation of CO and methanol and that the contribution of the hcp phase in those electrocatalytic processes is negligible. 相似文献