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Structured Islands on Single Crystal Electrodes: Surface Dynamics and the Reactivity at the Edge of the Islands

单晶电极上的结构化岛：表面动力学和岛边缘的反应性

基本信息

批准号：
9985837
负责人：
Andrzej Wieckowski
金额：
$ 38.6万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2000
资助国家：
美国
起止时间：
2000-06-15 至 2003-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9985837&HistoricalAwards=false
关键词：
Structured Islands Single Crystal Electrodes

项目摘要

This research project, supported by the Analytical and Surface Chemistry Program, continues studies of the surface electrochemistry of fuel cell electrodes. Professor Wieckowski and his coworkers at the University of Illinois are carrying out studies of the structure and reactivity of islands on platinum single crystal electrodes formed by the deposition of ruthenium and osmium co-adsorbates. Ternary island structures are under investigation as well. Scanning probe microscopy coupled with electrochemical methods and ultra-high vacuum sample preparation and characterization is used to investigate the electrooxidation of methanol on these electrode surfaces. Island edge effects, and the effect of sulfur coadsorption on the dynamics of this important fuel cell reaction is studied. The results of these studies are useful in the design of electrocatalysts and electrodes for fuel cell applications. The structure of binary and ternary metallic islands on platinum electrodes used in fuel cell applications is the subject of this research project supported in the Analytical and Surface Chemistry Program. Professor Wieckowski and coworkers at the University of Illinois are using scanning probe microscopy and electrochemical methods to examine methanol electrooxidation on these model electrode surfaces. Information from this research is useful in the design of improved fuel cell electrodes.

该研究项目在分析和表面化学计划的支持下，继续对燃料电池电极的表面电化学进行研究。伊利诺伊大学的Wieckowski教授和他的同事正在研究由Ru和Os共吸附形成的铂单晶电极上岛屿的结构和反应性。三元岛屿结构也在调查中。采用扫描探针显微镜结合电化学方法和超高真空样品制备与表征方法，研究了甲醇在这些电极表面的电氧化行为。研究了硫共吸附对这一重要的燃料电池反应动力学的影响。这些研究结果对燃料电池应用的电催化剂和电极的设计是有用的。用于燃料电池的铂电极上二元和三元金属岛的结构是分析和表面化学计划支持的这一研究项目的主题。伊利诺伊大学的Wieckowski教授和他的同事正在使用扫描探针显微镜和电化学方法来研究这些模型电极表面的甲醇电氧化。这项研究的信息对改进的燃料电池电极的设计是有用的。