Preparation of Core-Shell SiO2/Pt Particles via Layer-by-Layer Assembly and Their Electrooxidation and In-situ Electrochemical FTIR Spectra for CO

被引：0

作者：

Li Yong-Jun ^{[1
,2
]}

Zhou You-Chen ^{[1
]}

Sun Shi-Gang ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian Province, Peoples R China

[2] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2010年 / 26卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Platinum; Core-shell nanoparticle; Carbon monoxide; Electrooxidation; In-situ electrtochemical FTIR spectrum; SINGLE-CRYSTAL SURFACES; CARBON-MONOXIDE; PT-RU; PLATINUM NANOPARTICLES; THIN-FILMS; ADSORPTION; ACID; ABSORPTION; CHEMISORPTION; ELECTRODES;

D O I：

10.3866/PKU.WHXB20100514

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large-scale core-shell SiO2/Pt particles were synthesized via layer. by. layer assembly. The platinum shell was found to be about 26 nm thick and consisted of Pt nanoparticle aggregates. Cyclic voltammetry (CV) was employed to evaluate the electrocatalytic activity of the as. prepared core. shell SiO2/Pt particles for CO detection. Compared with the bulk Pt catalyst, the main oxidation potential was more negative at about 0.49 V (vs SCE). Moreover, CO adsorption behavior was also examined using in. situ electrochemical Fourier transform infrared (FTIR) spectrum. Interestingly, the FTIR spectra showed inverted IR bands of linearly bonded CO and each IR band was split into two bands with an interval of ca 14 cm(-1), which was difficult to discern at saturation coverage of CO on the Pt metal surface. Those anomalous phenomena can most probably be attributed to the structural effects of core. shell SiO2/Pt particles.

引用

页码：1773 / 1778

页数：6

共 48 条

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