Scanning Tunnelling Microscopy of Platinum Single Crystals and Platinum Supported Cataysts

铂单晶和铂负载催化剂的扫描隧道显微镜

• 批准号: 9001586
• 负责人: Eduardo Wolf
• 金额: $ 10.4万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9001586&HistoricalAwards=false
• 关键词: Scanning; Tunnelling; Microscopy; Platinum; Single

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.

在这项研究中，扫描隧道显微镜（STM）与X射线光电子光谱合作使用，以监测铂单晶体的表面，并在多种处理后使用型铂单晶和模型的石墨铂催化剂，包括将样品用作催化剂的催化剂用于Cyclohexene aratization。 研究了几个晶体平面，包括一些晶体平面，有些具有高米勒指数。 将单晶研究与模型催化剂研究进行了比较，以确定STM扫描的哪些特征与催化性能有关。 这本质上是一项基线研究，旨在建立在催化研究中应用STM的可靠性指南。 原则上，这种相对较新的技术具有揭示反应系统中无法检测到的反应系统的表面特征的巨大潜力。