Surface Chemistry of Complex Multi-Element Metal Oxides

复杂多元素金属氧化物的表面化学

• 批准号: 1213381
• 负责人: Kevin Smith
• 金额: $ 39.68万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2016-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1213381&HistoricalAwards=false
• 关键词: Surface; Chemistry; Complex; Multi; Element

In this research, supported by the Chemical Structures, Dynamics and Mechanisms Program of the Division of Chemistry, Prof. Kevin E. Smith from Boston University will use a powerful combination of x-ray spectroscopies to measure the surface electronic structure and chemical reactivity of complex multi-element metal oxides. The surface chemistry of these oxides is of fundamental scientific importance due to the significant role they play in catalysis, energy generation, and energy storage. While the chemical properties of many simple stochiometric metal oxides are well understood, this is not the case for oxides that contain multiple metal elements and have non-stochiometric and/or defective surfaces. The goal of this program is to understand the fundamental mechanisms controlling the chemical reaction of small molecules with the surfaces of such oxides under a wide range of physical conditions. In doing so, the results of this program will allow basic scientific knowledge of complex metal oxide surface chemistry to be applied to problems of importance in numerous applications, not least in solid oxide fuel cells, but also in solar and electrolytic water-splitting devices, and metal-air batteries. This program holds the promise of transforming the understanding of the surfaces and interfaces of complex oxide materials.This is an ambitious research program that uses intense x-rays to the study the fundamental physical properties of a class of materials of great technological and scientific importance, namely compounds of numerous metal atoms and oxygen atoms. These materials are used in catalysis, in energy generation devices such as fuel cells, and in energy storage devices such as batteries. The program aims to produce definitive measurements of the chemical reactivity and electronic properties of these complex metal oxides, and thus greatly expand our understanding of such materials. It addresses important problems in renewable energy generation, namely measuring the fundamental parameters that control the efficiency of fuel cells and other energy devices.

在这项研究中，在化学划分的化学结构，动力学和机制计划的支持下，波士顿大学的凯文·E·史密斯教授将使用X射线光谱的强大组合来测量复杂多元素金属氧化物的表面电子结构和化学反应性。 由于它们在催化，能量产生和能量储存中起着重要作用，因此这些氧化物的表面化学具有基本的科学重要性。 虽然众所周知，许多简单的静态金属氧化物的化学特性并非如此，但对于包含多种金属元件并且具有非稳态和/或缺陷表面的氧化物而言并非如此。 该程序的目的是了解在广泛的物理条件下，控制小分子与这种氧化物表面的化学反应的基本机制。 这样一来，该程序的结果将允许对复杂的金属氧化物表面化学反应的基本科学知识应用于许多应用中的重要性问题，尤其是在固体氧化物燃料电池中，以及在太阳能和电解水分拆分设备以及金属空气电池中。 该计划的承诺可以改变对复杂氧化物材料的表面和界面的理解。这是一个雄心勃勃的研究计划，它使用强烈的X射线进行研究，用于研究一类具有巨大技术和科学重要性的材料的基本物理特性，即众多金属原子和氧气原子。 这些材料用于催化，燃料电池等能源产生设备以及电池等能源存储设备中。 该计划旨在对这些复杂金属氧化物的化学反应性和电子特性产生明确的测量，从而大大扩展我们对这种材料的理解。 它解决了可再生能源产生的重要问题，即测量控制燃料电池和其他能源设备效率的基本参数。