中文摘要：

以Se溶胶为模板,合成了多层核壳结构的Se@Pt@Au@Pt实心纳米粒子；采用化学与电化学相结合的除硒方法制得了（PtAuPt）HN/GC,并表征了（PtAuPt-Se）HN的表面形貌、结构与组成；以甲酸为探针分子,比较了（ PtAuPt） HN/GC和Pt/C/GC对甲酸氧化的电催化行为,发现（ PtAuPt） HN/GC催化甲酸氧化只有1个氧化峰,峰电位和峰电流分别约为0.35 V和1.22 mA/cm^2,而Pt/C/GC则有2个氧化峰,在0.35 V时所对应的电流密度仅约为0.30 mA/cm^2,前者在该电位时的电流密度是后者的4倍；在0.30 mA/cm^2的电流密度下,（ PtAuPt） HN/GC对应的电极电位为0.01 V,比Pt/C/GC负移了340 mV；在600 s时的计时电流分别为0.06和0.02 mA/cm^2.（ PtAuPt） HN对甲酸氧化的电催化活性不但比 Pt/C高,而且具有一定的抗 CO中毒性能.

英文摘要：

Se@Pt@Au@Pt multilayer core-shell nanoparticles were synthesized in bulk using selenium colloids as template. After removing the selenium template by chemical method, Pt-Au-Pt hollow nanospheres [ （ PtAuPt-Se ） HN ] , which containing a small amount of residual selenium, were synthesized and used to modify GC electrode. After the residual selenium were removed from （ PtAuPt-Se） HN/GC by electrochemical method, （ PtAuPt ） HN/GC was obtained. Scanning electron microscopy （ SEM ） , transmission electron microscopy（TEM）, energy dispersive X-ray spectrocopy（EDS） and X-ray diffraction（XRD） were used to characterize their surface morphologies, structures and compositions. The electrocatalytic oxidation activity of （ PtAuPt） HN/GC and Pt/C/GC were measured by using formic acid as a probe molecule. Cyclic voltammogram （ CV） reveals that the current density of the formic acid oxidation on （ PtAuPt） HN/GC was four times as large as that of the latter when the potential was 0. 35 V. The potential of （ PtAuPt） HN/GC was shifted negatively about 340 mV compared to the Pt/C/GC when the current density was 0. 30 mA/cm^2 . The chronoamperometry of （ PtAuPt） HN/GC and Pt/C/GC was 0. 06 and 0. 02 mA/cm^2 respectively after 600 s. The results show that the electrocatalytic activity of （ PtAuPt） HN for formic acid oxidation was significantly higher than that of Pt/C.