Scanning Electrochemical Microscopy and Ultramicroelectrode Studies of Electrocatalysis at Nanoparticle Ensembles of Microdimensions and at Single Nanoparticles
微米尺寸纳米颗粒集合体和单个纳米颗粒电催化的扫描电化学显微镜和超微电极研究
基本信息
- 批准号:1757127
- 负责人:
- 金额:$ 27.29万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-07-01 至 2020-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this project funded by the Chemical Measurement and Imaging Program of the Division of Chemistry, Professor Cynthia Zoski of New Mexico State University is studying electrocatalysis at finite nanoparticle ensembles and single nanoparticles on conducting surfaces of ultramicrodimensions where kinetic investigations are carried out under high mass transport conditions. Nanoparticles are an important part of the overall catalyst design in energy devices such as fuel and solar cells. These studies provide wide-ranging knowledge on the relationship between nanoparticle size, distribution, and catalytic activity. These studies also address a key issue in electrocatalysis regarding the nature of intermediates and adsorbed species on a catalyst surface while the electrode reaction occurs, which aid in diagnosis of reaction mechanisms, with relevance to molecular recognition, sensing, and to infectious diseases where biofilm integrity and the relationship to quorum sensing and bacteria micro-colonies are of interest. Broader impacts also include training of post-doctoral fellows and graduate students in multi-disciplinary scientific research in areas of national importance, and developing a new course in advanced electrochemical techniques which targets post-doctoral fellows, graduate and senior undergraduate students from chemistry, chemical engineering, physics, and biology.This project focuses on electrocatalysis at nanoparticle ensembles and single nanoparticles, development of simulations to describe their behavior, fabrication and analysis of ensemble and single nanoparticle electrodes through single nanoparticle collisions at ultramicroelectrodes, and the use of scanning electrochemical microscopy to study the kinetics and nature of the reactivity of electrogenerated oxide films and those adsorbed as a result of an electrocatalytic reaction. The collision approach to nanoparticle electrodes allows control over the number of nanoparticles on a surface, flexibility in selection of the electrode material and nanoparticle type (e.g. metallic, core shell, alloy) and size, and a direct comparison between finite ensemble and single nanoparticle kinetics at the same electrode. The shape of collision transients provides insight into the microscopic details of the nature of nanoparticle interaction with an electrode and the kinetics of electrocatalytic reactions such as oxygen reduction at single nanoparticles. Using transient surface interrogation scanning electrochemical microscopy to study the nature and reactivity of oxide films overcomes the difficulties in traditional electrochemical experiments where the working electrode itself is used to find intermediates and the response is convoluted with the current from the electrolysis and capacitive charge.
在这个由化学系的化学测量和成像计划资助的项目中,新墨西哥州州立大学的Cynthia Zoski教授正在研究有限纳米粒子集合和单个纳米粒子在超微观尺寸导电表面上的电催化,其中在高质量传输条件下进行动力学研究。纳米颗粒是能源设备(如燃料和太阳能电池)中整体催化剂设计的重要组成部分。这些研究提供了关于纳米颗粒尺寸、分布和催化活性之间关系的广泛知识。这些研究还解决了电催化中的一个关键问题,即电极反应发生时催化剂表面上的中间体和吸附物质的性质,这有助于诊断反应机制,与分子识别、传感和传染病有关,其中生物膜完整性以及与群体感应和细菌微菌落的关系是感兴趣的。更广泛的影响还包括在国家重要领域的多学科科学研究中培训博士后研究员和研究生,以及开发针对化学,化学工程,物理和生物学的博士后研究员,研究生和高年级本科生的先进电化学技术新课程。该项目侧重于纳米粒子集合和单个纳米粒子的电催化,开发模拟来描述它们的行为,通过在超微电极处的单个纳米颗粒碰撞来制造和分析总体和单个纳米颗粒电极,以及使用扫描电化学显微镜来研究电生成氧化物膜的反应性的动力学和性质以及作为电催化反应的结果而被吸附的那些。 纳米颗粒电极的碰撞方法允许控制表面上纳米颗粒的数量,选择电极材料和纳米颗粒类型(例如金属、核壳、合金)和尺寸的灵活性,以及在相同电极处有限总体和单个纳米颗粒动力学之间的直接比较。碰撞瞬态的形状提供了洞察纳米粒子与电极相互作用的性质的微观细节和电催化反应的动力学,如在单个纳米粒子的氧还原。 使用瞬态表面询问扫描电化学显微镜来研究氧化物膜的性质和反应性克服了传统电化学实验中的困难,在传统电化学实验中,工作电极本身用于寻找中间体,并且响应与来自电解和电容电荷的电流卷积。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Cynthia Zoski其他文献
Cynthia Zoski的其他文献
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{{ truncateString('Cynthia Zoski', 18)}}的其他基金
Scanning Electrochemical Microscopy and Ultramicroelectrode Studies of Electrocatalysis at Nanoparticle Ensembles of Microdimensions and at Single Nanoparticles
微米尺寸纳米颗粒集合体和单个纳米颗粒电催化的扫描电化学显微镜和超微电极研究
- 批准号:
1408608 - 财政年份:2014
- 资助金额:
$ 27.29万 - 项目类别:
Standard Grant
Scanning Electrochemical Microscopy Workshop, August 2008, Blue Mountain Lake, NY
扫描电化学显微镜研讨会,2008 年 8 月,纽约州蓝山湖
- 批准号:
0835451 - 财政年份:2008
- 资助金额:
$ 27.29万 - 项目类别:
Standard Grant
New Frontiers of Electrocatalysis Workshop
电催化新领域研讨会
- 批准号:
0808335 - 财政年份:2008
- 资助金额:
$ 27.29万 - 项目类别:
Standard Grant
Electrochemical Investigations on Addressable Array Platforms
可寻址阵列平台的电化学研究
- 批准号:
0809966 - 财政年份:2008
- 资助金额:
$ 27.29万 - 项目类别:
Standard Grant
GOALI: Addressable Multielectrode Arrays Based on Membrane Templates: Fabrication, Characterization, and Instrumentation
GOALI:基于膜模板的可寻址多电极阵列:制造、表征和仪器
- 批准号:
0540843 - 财政年份:2005
- 资助金额:
$ 27.29万 - 项目类别:
Continuing Grant
GOALI: Addressable Multielectrode Arrays Based on Membrane Templates: Fabrication, Characterization, and Instrumentation
GOALI:基于膜模板的可寻址多电极阵列:制造、表征和仪器
- 批准号:
0210315 - 财政年份:2002
- 资助金额:
$ 27.29万 - 项目类别:
Continuing Grant
Microelectrode Studies of Aqueous Marine Environments
海洋水环境的微电极研究
- 批准号:
9709897 - 财政年份:1997
- 资助金额:
$ 27.29万 - 项目类别:
Standard Grant
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