A NEW APPROACH TO SELECTIVITY IN CATALYSIS

这项建议涉及到的选择性问题， 氢反应如面选择性和顺式选择性的合成应用 氢化、顺式选择性半氢化、选择性氢化 多烯和官能化烯烃的选择性氢化。 的 表面结构敏感性和这些氢化的苛刻性质 反应及其相关的副反应将被识别。 一 钯膜反应器将用于区分表面氢 和次表面氢作为氢化反应中的活性物质。 的 所获得的机械见解将指导新的实验的发展。 更高选择性的加氢反应技术。 薄膜材料 有序的表面结构将被制备，表征和测试， 选择性加氢催化剂的新原型。

This proposal is concerned with the selectivity problems encountered in the synthetic application of hydrogen reactions like face- and cis-selective hydrogenation, cis-selective semi-hydrogenation, selective hydrogenation of polyenes, and selective hydrogenation of functionalized olefins. The surface structure sensitivity and demanding nature of these hydrogenation reactions and their associated side reactions will be identified. A Pd-membrane reactor will be used to differentiate between surface hydrogen and sub-surface hydrogen as active species in hydrogenation reactions. The mechanistic insight obtained will guide the development of new experimental techniques for more selective hydrogenation reactions. Thin film materials of ordered surface structure will be prepared, characterized, and tested as new prototypes of selective hydrogenation catalysts.