Abstract
Standing wave ambient pressure photoemission spectroscopy (SWAPPS) is a promising method to investigate chemical and potential gradients across solid-vapor and solid-liquid interfaces under close-to-realistic environmental conditions, far away from high vacuum. Until now, these investigations have been performed only near room temperature, but for a wide range of interfacial processes, chief among them being heterogeneous catalysis, measurements at elevated temperatures are required. One concern in these investigations is the temperature stability of the multilayer mirrors, which generate the standing wave field. At elevated temperatures, degradation of the multilayer mirror due to, for example, interdiffusion between the adjacent layers, decreases the modulation of the standing wave field, thus rendering SWAPPS experiments much harder to perform. Here, we show that multilayer mirrors consisting of alternate B4C and W layers are stable at temperatures exceeding 600 °C and are, thus, promising candidates for future studies of surface and subsurface species in heterogeneous catalytic reactions using SWAPPS.
Highlights
Interfaces govern many important processes in the environment and technology
We show that multilayer mirrors consisting of alternate B4C and W layers are stable at temperatures exceeding 600 °C and are, promising candidates for future studies of surface and subsurface species in heterogeneous catalytic reactions using Standing wave ambient pressure photoemission spectroscopy (SWAPPS)
While they can be vastly different in character, e.g., ranging from solid-solid to solid-liquid to solid-vapor, they share the basic characteristic of a discontinuity across the interface in the chemical composition, density, structure, as well as chemical and electrical potentials
Summary
Interfaces govern many important processes in the environment and technology. While they can be vastly different in character, e.g., ranging from solid-solid to solid-liquid to solid-vapor, they share the basic characteristic of a discontinuity across the interface in the chemical composition, density, structure, as well as chemical and electrical potentials. Among them are cross-sectional transmission and scanning electron microscopy as well as scanning transmission x-ray microscopy.. Among them are cross-sectional transmission and scanning electron microscopy as well as scanning transmission x-ray microscopy.7 These techniques provide information on the atomic positions in the direction across the interface, and in the plane of the interface Among them are cross-sectional transmission and scanning electron microscopy as well as scanning transmission x-ray microscopy. These techniques provide information on the atomic positions in the direction across the interface, and in the plane of the interface
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
