The low and high coverage adsorption structure of CO on unreconstructed Ir(100)-(1×1)

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Surface Science Pub Date : 2025-06-06 DOI:10.1016/j.susc.2025.122786

Mohammad Alif Arman , Edvin Lundgren , Jan Knudsen

引用次数: 0

Abstract

The investigation of carbon monoxide (CO) adsorption on the unreconstructed Ir(100)-(1 × 1) surface under ultra-high vacuum (UHV) conditions is studied with scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and high-resolution core-level spectroscopy (HRCLS). At a low coverage of 0.5 ML (monolayer), CO molecules adopt a previously documented c(2 × 2) structure, having CO molecules adsorbed exclusively in the top sites. When the coverage increases to 0.83 ML, a c(6 × 2) phase is observed having a combination of bridge and top adsorption sites positions. A comprehensive picture of CO adsorption on Ir(100)-(1 × 1) is presented here by correlating the spectroscopic data with the observed distinct structural formations from STM and LEED.

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CO在未重构Ir(100)-（1×1）上的低、高覆盖吸附结构

利用扫描隧道显微镜（STM）、低能电子衍射（LEED）和高分辨率核能级光谱（HRCLS）研究了超高真空（UHV）条件下未重构Ir(100)-（1 × 1）表面一氧化碳（CO）的吸附。在0.5 ML（单层）的低覆盖率下，CO分子采用先前记录的c（2 × 2）结构，CO分子仅在顶部位置吸附。当覆盖率增加到0.83 ML时，观察到c（6 × 2）相具有桥和顶部吸附位点的组合。通过将光谱数据与STM和LEED观察到的不同结构形成相关联，给出了CO在Ir(100)-（1 × 1）上吸附的全面图景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Surface Science 化学-物理：凝聚态物理

CiteScore

3.30

自引率

5.30%

发文量

137

审稿时长

25 days

期刊介绍： Surface Science is devoted to elucidating the fundamental aspects of chemistry and physics occurring at a wide range of surfaces and interfaces and to disseminating this knowledge fast. The journal welcomes a broad spectrum of topics, including but not limited to: • model systems (e.g. in Ultra High Vacuum) under well-controlled reactive conditions • nanoscale science and engineering, including manipulation of matter at the atomic/molecular scale and assembly phenomena • reactivity of surfaces as related to various applied areas including heterogeneous catalysis, chemistry at electrified interfaces, and semiconductors functionalization • phenomena at interfaces relevant to energy storage and conversion, and fuels production and utilization • surface reactivity for environmental protection and pollution remediation • interactions at surfaces of soft matter, including polymers and biomaterials. Both experimental and theoretical work, including modeling, is within the scope of the journal. Work published in Surface Science reaches a wide readership, from chemistry and physics to biology and materials science and engineering, providing an excellent forum for cross-fertilization of ideas and broad dissemination of scientific discoveries.