U.S.-Mexico Cooperative Research: The Formation of Supported Bimetallic Clusters with Emphasis on the Effect of Support

该奖项将支持理查德D教授。冈萨雷斯 伊利诺伊大学芝加哥分校与 墨西哥城市大学的里卡多·戈麦斯教授 在伊斯塔帕拉帕。 最近完成的研究表明， 相互作用对于确定生成的表面很重要 负载型多金属催化剂的组成。 特别是， 移动的表面金属前体的存在导致 金属在所得到氧化物中的表面富集 催化 研究人员的目标是确定 这些散射体-表面复合物使用漫射紫外反射 谱 金属-载体相互作用的强度 将通过使用定量差异来衡量 扫描量热法和元素组成的所得 通过使用分散的纳米颗粒， X射线光谱法（EDXS）。 EDXS还将用于研究 颗粒间金属相关系 拟议的研究将同时在 伊利诺伊大学芝加哥分校和大都会大学 位于墨西哥的伊斯塔帕拉帕。 原位紫外漫反射 研究，微量热DSC研究和催化剂特性。 化研究，包括表面成分测量， 将在伊利诺伊大学进行。 催化 探针反应和EDXS研究的主要部分将是 在墨西哥演出。

This award will support Professor Richard D. Gonzalez of the University of Illinois at Chicago Circle in collaboration with Professor Ricardo Gomez of the Metropolitan University of Mexico at Iztapalapa. Studies recently completed suggest that metal-precursor-support interactions are important in determining the resulting surface composition of supported multimetallic catalysts. In particular, the presence of a mobile surface metal-precursor results in the surface enrichment of that metal in the resulting bimetallic catalyst. The investigators aim to identify the structure of these precursor-surface complexes using diffuse U.V. reflectance spectroscopy. The strength of the metal-support interactions will be measured through the use of quantitative differential scanning calorimetry and the elemental composition of the resulting bimetallic particles will be obtained through the use of dispersive x-ray spectroscopy (EDXS). EDXS will also be used to study interparticle metal phase relationships. The proposed research will be carried out simultaneously at the University of Illinois at Chicago and the Metropolitan University of Mexico at Iztapalapa. The in-situ diffuse U.V. reflectance studies, the microcalorimetric DSC studies and the catalyst charac- terization studies, including the surface composition measurements, will be carried out at the University of Illinois. The catalytic probe reactions and major portion of the EDXS studies will be performed in Mexico.