Scanning Tunnelling Microscopy of Platinum Single Crystals and Platinum Supported Cataysts

在这项研究中，扫描隧道显微镜(STM)与X射线光电子能谱相结合，用于监测铂单晶的表面，以及经过各种处理后的石墨负载铂催化剂模型，包括将样品用作环己烯芳构化催化剂。研究了几种晶面，包括低密勒指数晶面和高密勒指数晶面。将单晶研究与模型催化剂研究进行比较，以确定STM扫描的哪些特征与催化性能相关。这基本上是一项基线研究，旨在为STM在催化研究中的应用建立可靠性指南。原则上，这项相对较新的技术在揭示迄今无法检测到的反应体系中的表面特征方面具有巨大的潜力。

In this study, scanning tunnelling microscopy (STM) is used in conjunction with X-ray photoelectron spectroscopy to monitor the surfaces of platinum single crystals and model graphite- supported platinum catalysts following a variety of treatments, including use of the samples as catalysts for cyclohexene aromatization. Several crystal planes are studied, including some with low and some with high Miller indices. Single-crystal studies are compared with model catalyst studies to ascertain which features of the STM scans are relevant to catalytic performance. This is essentially a baseline study to establish reliability guidelines for application of STM in catalysis research. In principle, this relatively new technique has great potential to reveal surface features in reacting systems heretofore impossible to detect.