物理化学学报2011，Vol.27Issue(8)：1868-1874,7.
“三明治式”多层Au/Pt复合薄膜的制备及其对甲醇的电氧化
Preparation of 'Sandwich-Like' Au/Pt Composite Multilayer Films for Methanol Electrooxidation
摘要
Abstract
Pt/Au composite monolayer films were fabricated by combining interfacial assembly and under-potential deposition (UPD) with redox replacement.Based on the Pt/Au composite monolayers,an organic linker-free method was proposed for the fabrication of sandwich-like Pt/Au composite multilayer films:(Pt/Au)n,Ptm/Au,and (Pt3/Au)k (n,m,or k represents the layer number).Electron microscopy was used to characterize the morphologies of the Au monolayer films and the Pt/Au composite multilayer films.For each type of composite multilayer films,a common characteristic was that the effective electroactive areas increased with an increase in the layer number.Additionally,the electrocatalytic activities of the composite multilayer films for methanol electrooxidation are systematically discussed by examining the catalytic current densities and its tolerance toward carbonaceous species.For the same series of composite multilayer films (Pt/Au)3,Pt3/Au,and (Pt3/Au)2 showed a higher catalytic current density than bulk Pt (Ptbutk).Among the three composite multilayer films,(Pt/Au)3 showed the best catalytic performance in terms of the current density and tolerance toward carbonaceous species.The tolerance of (Pt/Au)3 to carbonaceous species was found to be better than that of the commercial Pt/C catalyst.This better electrocatalytic activity may be attributed to the maximum synergistic effect between Au and Pt,which depends on the Pt:Au atomic ratio and also the arrangement of Pt and Au nanoparticles.关键词
界面组装/欠电位沉积/Au/Pt复合多层膜/电氧化/甲醇Key words
Interfacial self-assembly/Under-potential deposition/Au/Pt composite multilayer film/Electrooxidation/Methanol分类
化学化工引用本文复制引用
赵静,孙越,李永军,梁韧..“三明治式”多层Au/Pt复合薄膜的制备及其对甲醇的电氧化[J].物理化学学报,2011,27(8):1868-1874,7.基金项目
国家自然科学基金(20703016),湖南省科技计划(2010FJ6030)及固体表面物理化学国家重点实验室(厦门大学)开放课题经费资助The project was supported by the National Natural Science Foundation of China (20703016),Scientific and Technological Projects of Hunan Province,China (2010F J6030) and State Key Laboratory for Physical Chemistry of Solid Surface (Xiamen University),China. （20703016）
