具有纳米结构的铂电极表面的电化学制备及其性能  

Preparation of Nano-Structured Platinum Electrode Surfaces by Electrochemical Methods and Its Properties

作　　者：王小聪[1] 任斌[2] 曹婧[1] 颜佳伟[2] 钟起玲[3] 田中群[2] 

机构地区：[1]天津科技大学理学院,天津300222 [2]厦门大学化学系固体表面物理化学国家重点实验室,厦门361005 [3]江西师范大学化学学院,南昌330027

出　　处：《化学学报》2005年第23期2112-2116,共5页Acta Chimica Sinica

基　　金：国家重点基础研究发展规划(973)(No.200lCB610506);厦门大学固体表面物理化学国家重点实验室基金(No.9906);天津科技大学自然科学基金(No.0218152)资助项目.

摘　　要：采用控电位方波氧化还原法和控电流方波氧化还原法分别成功地制备了控电位粗糙铂(CPRPt)和控电流粗糙铂(CCRPt)纳米级铂电极表面.通过考察两类电极表面对甲醇电催化氧化的性能,发现CPRPt和CCRPt纳米级铂电极表面催化氧化甲醇峰值电流密度分别是光滑铂电极的约1.35倍和2.50倍.采用现场拉曼光谱技术考察了两电极表面的表面增强拉曼(SERS)效应,发现两电极表面对吡啶吸附均有较高SERS活性,CPRPt电极表面还对有机小分子的解离吸附的拉曼光谱具有特殊的增强效应.本文初步探讨了两电极表面的SERS机理.The nano-sized constant potential roughened platinum （CPRPt） and constant current roughened platinum （CCRPt） electrode-surfaces have been prepared successfully by oxidation-reduction-cycle method. Many regularly shaped triangle-cones of the size of 10-30 nm were observed on the CPRPt electrode surface by the scan electron microscopy （SEM） technology. The electro-oxidation of methanol on the nano-CPRPt and the CCRPt electrode-surfaces was used to investigate the performances with the results of the peak current density 1.35 and 2.50 times greater than those of smooth Pt respectively. The in situ Raman spectra of these two kinds of electrode-surfaces indicated their high surface enhanced Raman spectrum （SERS） effects for pyridine adsorption. The CPRPt electrode surface has extraordinarily enhanced effect for adsorption-dissociation of small organic molecules. The mechanism of SERS on these platinum electrode-surfaces has been also discussed.

关 键 词：铂 纳米 制备 表面增强拉曼 电催化氧化 

分 类 号：O646.54[理学—物理化学] TQ153.2[理学—化学]