Analytical Chemistry of Alumina-Supported Catalyst Surfaces

本研究由化学部的分析和表面化学项目支持，将研究氧化铝负载催化剂的基础化学。这种催化剂通常用于石油和石化工业，但尚未得到很好的理解。通过对催化剂表面化学细节的研究，将获得对催化效率和特异性优化的理解。反过来，可以预期使用这种催化剂的工业加工的优化。这项研究由化学部门的分析和表面化学项目支持，将采用电子光谱化学分析（ESCA）来表征氧化铝负载的铬催化剂的表面氧化状态。然后把氧化态和反应性联系起来。还将追求容易沉积明确的已知氧化态薄层的方法。通过将催化活性与表面结构和氧化态联系起来，将寻求对催化活性的控制。拉曼光谱和x射线吸收精细结构测量也将被采用。

This research, supported by the Analytical and Surface Chemistry Program in the Chemistry Division, will study the fundamental chemistry of alumina-supported catalysts. Such catalysts are commonly used in the petroleum and petrochemical industries, but are not well understood. By studying the details of the surface chemistry of the catalysts, understanding leading to optimization of catalytic efficiency and specificity will be obtained. In turn, optimization of industrial processing with such catalysts may be anticipated. %%% This research, supported by the Analytical and Surface Chemistry Program in the Chemistry Division, will employ Electron Spectroscopy for Chemical Analysis (ESCA) to characterize the surface oxidation state of alumina-supported chromium catalysts, and then correlate oxidation state with reactivity. Means of easily depositing well-defined thin layers of known oxidation state will also be pursued. By correlating catalytic activity with surface structure and oxidation state, control of catalytic activity will be sought. Raman spectroscopy and X-ray Absorption Fine Structure measurements will also be employed.