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dc.contributor.authorXia, SQ
dc.contributor.author夏盛清
dc.contributor.authorChen, SP
dc.contributor.author陈声培
dc.contributor.authorSun, SG
dc.contributor.author孙世刚
dc.date.accessioned2012-06-10T01:36:08Z
dc.date.available2012-06-10T01:36:08Z
dc.date.issued2001
dc.identifier.citationACTA PHYSICO-CHIMICA SINICA,2001,17(2):134-139zh_CN
dc.identifier.issn1000-6818
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/12691
dc.description.abstractThe electrocatalysts of platinum based Pb-Sb surface alloy were prepared by electrochemical codeposition under cyclic voltammetric conditions. The structure and properties of these electrocatalysts were studied by techniques of cyclic voltammetry, electrochemical quartz crystal microbalance (EQCM), scanning tunneling microscopy(STM) and X-ray photoelectron spectroscopy(XPS). The results demonstrated that the hydrogen evolution on the prepared electrocatalyst was postponed to -0.45 V, i. e., 200 mV has been shifted negatively in comparison with hydrogen evolution at a platinum electrode, In addition, the oxidization of Pb and Sb components in surface alloy was positively shifted to above 0.15 V, which is much higher than the oxidization potential of Ph and Sb metal electrodes. The stability of surface alloy electrode is confirmed to be higher than Pb and Sb metal electrodes that were employed often in organic electrosynthesis. The process of formation of surface alloy was studied in situ by using an EQCM and ex situ by using a STM. The results have converged to illustrate that the surface alloy is constructed of nanoparticles with regular size of about 10 nanometers. The EQCM analysis and XPS depth profiling indicated that the surface alloy is formed on the top layer of a few nanometers in thickness of the Sb-Pb-Pt/GC electrode.zh_CN
dc.language.isozhzh_CN
dc.publisherPEKING UNIV PRESSzh_CN
dc.subjectsurface alloyzh_CN
dc.subjectSb-Pb-Pt/GCzh_CN
dc.subjectSTMzh_CN
dc.subjectEQCMzh_CN
dc.subjectXPSzh_CN
dc.titleThe preparation and characterization of platinum based Pb-Sb surface alloy electrodezh_CN
dc.typeArticlezh_CN


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