铂和钌纳米薄膜电极的全湿法制备及表面增强红外效应  

Surface-enhanced IR Absorption Effect of Pt and Ru Nanofilms Fabricated by All-wet Processes

作　　者：严彦刚[1] 李巧霞[1] 霍胜娟[1] 孙颖娜[1] 蔡文斌[1] 

机构地区：[1]复旦大学化学系上海市分子催化和功能材料重点实验室,上海200433

出　　处：《化学学报》2005年第6期545-549,F009,共6页Acta Chimica Sinica

基　　金：上海市社会发展重大专项子课题二期(No.993012010);上海市科技发展基金(No.0452nm064);复旦大学引进人才启动基金资助;国家自然科学基金(Nos.20333040;20473025);厦门大学固体表面物理化学国家重点实验室开放课题基金(No.200303)部分资助.

摘　　要：金属纳米薄膜的合理制备是衰减全反射表面增强红外光谱法(ATR-SEIRAS)成功应用的关键.通过简便可控的全湿法镀膜,即先在红外窗口硅面上化学镀金膜,而后再电沉积铂或钌,制得具有极强表面增强红外效应、吸收峰向正常且几乎“无针孔”的铂或钌纳米薄膜电极,从而可使ATR-SEIRAS技术广泛应用于研究铂、钌电极表面的吸附与反应.Economical and practicable all-wet processes have been developed to fabricate virtually pinhole-free Pt and Ru nanofilms for attenuate-total-reflection (ATR) surface-enhanced IR absorption spectroscopy (SEIRAS). The processes incorporated an initial chemical deposition of Au nanofilm on the basal plane of a Si prism with a subsequent electrodeposition of desired overlayers. Pt and Ru nanofilms thus obtained exhibit unprecedented SEIRA effect with unipolar and normally directed absorption bands for CO adlayers. This versatile strategy opens a wide opportunity for extending ATR-SEIRAS to explore surface adsorption and reaction involved in electrocatalysis.

关 键 词：表面增强 正常 ATR 效应 反应 红外光谱法 衰减全反射 化学镀金 针孔 电沉积 

分 类 号：O646[理学—物理化学]