Surface Science and Model Catalysis with Ionic Liquid-Modified Materials
Surface Science and Model Catalysis with Ionic Liquid-Modified Materials
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DOI：
10.1002/adma.201100211
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发表时间：
2011-06-17
影响因子：
29.4
通讯作者：
Stark, M.
中科院分区：
文献类型：
--
作者：
Steinrueck, H. -P.;Libuda, J.;Stark, M.
利用离子液体薄膜作为载体修饰功能层的材料在多相催化中开辟了各种新的可能性，其范围从气体-表面相互作用的剪裁到分子定义的反应位点的固定。本报告回顾了最近的进展，在微观层面上的理解“支持离子液体相（SILP）”和“固体催化剂与离子液体层（SCILL）”材料，使用表面科学和模型催化类型的方法。薄膜IL系统不仅可以非原位制备，而且可以在超真空（UHV）条件下使用原子上良好限定的表面作为基底原位制备，例如通过物理气相沉积（PVD）。由于它们的低蒸汽压，这些系统可以在超高真空下使用全光谱的表面科学技术进行研究。我们讨论了这种方法的一般策略和考虑因素，并从互补的方法，特别是光电子能谱和表面振动光谱的信息。
Materials making use of thin ionic liquid (IL) films as support-modifying functional layer open up a variety of new possibilities in heterogeneous catalysis, which range from the tailoring of gas-surface interactions to the immobilization of molecularly defined reactive sites. The present report reviews recent progress towards an understanding of "supported ionic liquid phase (SILP)" and "solid catalysts with ionic liquid layer (SCILL)" materials at the microscopic level, using a surface science and model catalysis type of approach. Thin film IL systems can be prepared not only ex-situ, but also in-situ under ultrahigh vacuum (UHV) conditions using atomically well-defined surfaces as substrates, for example by physical vapor deposition (PVD). Due to their low vapor pressure, these systems can be studied in UHV using the full spectrum of surface science techniques. We discuss general strategies and considerations of this approach and exemplify the information available from complementary methods, specifically photoelectron spectroscopy and surface vibrational spectroscopy.