Gas-Solid Interaction at Semiconductor Surfaces

半导体表面的气固相互作用

• 批准号: 9520806
• 负责人: Jack Lunsford
• 金额: $ 41.25万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1999-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520806&HistoricalAwards=false
• 关键词: Gas; Solid; Interaction; Semiconductor; Surfaces

This research project, supported in the Analytical and Surface Chemistry Program, addresses the question of the mechanism of oxidative coupling of methane over oxide catalyst surfaces. The use of in situ Raman spectroscopy to identify potentially active forms of oxygen such as peroxide, superoxide, and oxo species is a principal focus of this work. Isotope labeling experiments will be used to help to identify intermediates, as well as to ascertain rate determining steps in the oxidative and non-oxidative coupling reactions of methane over oxide and zeolitic catalyst materials. Coupling of methane to form aromatic products is also being examined in this research. The conversion of methane, an abundant hydrocarbon resource, into more useful chemicals and fuels is an important goal of heterogeneous catalysis science. The thrust of this research project is directed toward developing an understanding of the detailed mechanism of methane conversion on oxide catalysts, primarily via oxidative coupling reactions. Raman spectroscopic probes will be developed and used to provide this understanding. The outcome of this research project could have significant impact on this technologically and environmentally important process.

本研究项目由分析和表面化学项目资助，研究甲烷在氧化物催化剂表面氧化偶联的机理。使用原位拉曼光谱来识别潜在的活性形式的氧，如过氧化物，超氧化物和氧是这项工作的主要焦点。同位素标记实验将用于帮助识别中间体，以及确定甲烷在氧化物和沸石催化剂材料上的氧化和非氧化偶联反应的速率决定步骤。甲烷偶联生成芳香族产物的研究也在进行中。甲烷是一种丰富的碳氢化合物资源，将其转化为更有用的化学品和燃料是多相催化科学的一个重要目标。这个研究项目的重点是发展对甲烷在氧化物催化剂上转化的详细机制的理解，主要是通过氧化偶联反应。拉曼光谱探针将被开发并用于提供这种理解。这项研究项目的结果可能对这一技术和环境上重要的进程产生重大影响。