Interfacial Electrochemistry and Electrocatalysis: Understanding and Directing Electrochemical Phenomena at the Molecular Level

界面电化学和电催化：在分子水平上理解和指导电化学现象

• 批准号: 121968-2012
• 负责人: Jerkiewicz, Gregory
• 金额: $ 4.01万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=593344
• 关键词: Interfacial; Electrochemistry; Electrocatalysis; Understanding; Directing

Our research program in interfacial electrochemistry and electrocatalysis consist of four innovative and inter-related thrusts that will be pursued at the same time with the objective of gaining molecular-level understanding of electrochemical phenomena. We will study the origin of electrocatalytic activity of Pt and will identify key characteristics that will be used to develop a set of guidelines for the synthesis of non-Pt electrocatalysts possessing similar electrocatalytic properties. This will be achieved through detailed experimental research, which will include the development of variable-temperature electrochemical quartz-crystal nanobalance. We will investigate size-dependent phenomena in electrocatalysis by studying the electro-adsorption of H on spherical Pt nanoparticles having well-tailored dimensions and determine the critical dimension at which the size of nanoparticles begins to affect the H electro-adsorption giving rise to a unique interfacial behavior. We will carry out meticulous investigation of the electro-oxidation and electro-dissolution of Pt(hkl) electrodes with the objective of discovering effects that are specific to the surface geometry. Because Pt nanoparticles used in polymer electrolyte membrane fuel cells contain mainly (111) and (100) facets plus edges and corners, this research will contribute to the understanding of their degradation. We will also study the impact of temperature on the formation of metallic layers that are sub-nm in thickness, possess a tailored chemical composition and fine-tuned adhesion to the substrate; we will assess the influence of temperature variation on their physical properties. The research program comprising four themes creates an opportunity for a breakthrough, if not for a discovery. It is ambitious and challenging, but our ability to successfully undertake difficult projects and our past achievements prove that the proposed research can be realized with well-trained HQP. Though the research is basic in nature, it will benefit electrochemical technologies by creating new knowledge. Finally, six HQP will be trained in modern electrochemistry and electrocatalysis, and will develop a unique set of inter-disciplinary skills, which will enhance their future careers.

我们在界面电化学和电催化方面的研究计划由四个创新和相关的推力组成，这些推力将同时追求，目的是获得对电化学现象的分子水平的理解。我们将研究PT的电催化活性的起源，并将确定关键特征，这些特征将用于制定一组指南，用于合成具有相似电催化特性的非PPT电催化剂。这将通过详细的实验研究来实现，该研究将包括开发可变的电化学石化石化性石化性纳米平衡。我们将通过研究具有良好量化尺寸的球形PT纳米颗粒上H上H h的电吸附来研究尺寸依赖性现象，并确定纳米颗粒大小开始影响H电气吸附的临界维度，从而产生了独特的介入性。我们将对PT（HKL）电极的电氧化和电溶解的细致研究，目的是发现特定于表面几何形状的作用。由于在聚合物电解质膜燃料电池中使用的PT纳米颗粒主要包含（111）和（100）刻面以及边缘和角落，因此这项研究将有助于理解其降解。我们还将研究温度对厚度亚NM的金属层形成，具有量身定制的化学成分和对底物的微调粘附的影响；我们将评估温度变化对其物理特性的影响。包括四个主题的研究计划为突破（即使不是发现）创造了机会。这是雄心勃勃且具有挑战性的，但是我们成功进行困难项目的能力，我们过去的成就证明了拟议的研究可以通过训练有素的HQP实现。尽管该研究本质上是基本的，但它将通过创建新知识来受益。最后，六个HQP将接受现代电化学和电催化的培训，并将发展一系列独特的跨学科技能，这将增强其未来的职业。