Determination of Metal-Oxygen Bond Strength in Oxide Catalysts

氧化物催化剂中金属-氧键强度的测定

• 批准号: 8809744
• 负责人: Harold Kung
• 金额: $ 10.8万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-09-01 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8809744&HistoricalAwards=false
• 关键词: Determination; Metal; Oxygen; Bond; Strength

The objective of this project is to obtain quantitative values for metal-oxygen bond strengths in oxides used as selective oxidation catalysts. The initial systems to be studied consist of a monolayer of vanadium oxide supported on titania or alumina. Differential heats of reduction are determined using a calorimeter in order to observe changes in heats of reduction as a function of extent of reduction. Vibrational spectroscopy (if possible, on the same samples used for calorimetry) will be used to identify the order in which different oxygens in the structure are reduced. Hopefully, the spectra will correspond to known structures whose bonds can be can be assigned from literature values, but, if unusual bonds appear, X-ray analysis will be used to assign the structures. Surface oxygen bond strengths should be a key parameter for the design of selective oxidation catalysts, specifically for specialty chemical production. The data is also relevant in tribology, adhesion, and passivation of semiconductors.

本项目的目标是获得定量的 氧化物中的金属-氧键强度值， 选择性氧化催化剂 最初的系统是 研究了由单层的钒氧化物支撑在 二氧化钛或氧化铝。 微分还原热是 使用量热计测定，以观察 还原热是还原程度的函数。 振动光谱（如果可能，在相同的样品上 用于量热法）将用于确定 该结构中的不同氧被还原。 希望光谱能与已知结构相对应 其键可以由文献值指定， 但是，如果出现不寻常的债券，X射线分析将被用来 分配结构。 表面氧键强度应该是一个关键参数， 选择性氧化催化剂的设计，特别是用于 特种化学品生产。 这些数据也与 摩擦学、粘附和半导体钝化。