Using Auger transitions as a route to determine the oxidation state of copper in high-pressure electron spectroscopy

IF 2.1 4区 化学 Q3 CHEMISTRY, PHYSICAL Surface Science Pub Date : 2024-07-26 DOI:10.1016/j.susc.2024.122565
Markus Soldemo , Fernando Garcia-Martinez , Christopher M Goodwin , Patrick Lömker , Mikhail Shipilin , Anders Nilsson , Peter Amann , Sarp Kaya , Jonas Weissenrieder
{"title":"Using Auger transitions as a route to determine the oxidation state of copper in high-pressure electron spectroscopy","authors":"Markus Soldemo ,&nbsp;Fernando Garcia-Martinez ,&nbsp;Christopher M Goodwin ,&nbsp;Patrick Lömker ,&nbsp;Mikhail Shipilin ,&nbsp;Anders Nilsson ,&nbsp;Peter Amann ,&nbsp;Sarp Kaya ,&nbsp;Jonas Weissenrieder","doi":"10.1016/j.susc.2024.122565","DOIUrl":null,"url":null,"abstract":"<div><p>Accurate discrimination between metallic copper (Cu<sup>0</sup>) and cuprous oxide (Cu<sub>2</sub>O, Cu<sup>+</sup>) in electron spectroscopy commonly relies on the Auger electron spectroscopy (AES) Cu L<sub>3</sub>M<sub>4,5</sub>M<sub>4,5</sub> transitions, as the X-ray photoelectron spectroscopy (XPS) Cu core-levels do not provide large enough binding energy shifts. The kinetic energy of the AES Cu L<sub>3</sub>M<sub>4,5</sub>M<sub>4,5</sub> electrons is ∼917 eV, which leaves the AES electron susceptible for efficient scattering in the gas phase and attenuation of the signal above near-ambient pressure conditions. To study copper-based materials at higher pressures, e.g., the active state of a catalyst, Auger transitions providing electrons with higher kinetic energies are needed.</p><p>This study focuses on AES transitions involving the Cu K-shell (1s electrons) that exhibit discernible kinetic energy shifts between the oxidation states of Cu. It is shown that the AES Cu KL<sub>2</sub>M<sub>4,5</sub> transition, with kinetic energy of ∼7936 eV, provides a large enough kinetic energy shift between metallic copper and Cu<sub>2</sub>O. AES signal is demonstrated in an ambient of 150 mbar CO<sub>2</sub>.</p></div>","PeriodicalId":22100,"journal":{"name":"Surface Science","volume":"749 ","pages":"Article 122565"},"PeriodicalIF":2.1000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S003960282400116X/pdfft?md5=4fdbf89520066107d67767248dbe3449&pid=1-s2.0-S003960282400116X-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surface Science","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003960282400116X","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

Abstract

Accurate discrimination between metallic copper (Cu0) and cuprous oxide (Cu2O, Cu+) in electron spectroscopy commonly relies on the Auger electron spectroscopy (AES) Cu L3M4,5M4,5 transitions, as the X-ray photoelectron spectroscopy (XPS) Cu core-levels do not provide large enough binding energy shifts. The kinetic energy of the AES Cu L3M4,5M4,5 electrons is ∼917 eV, which leaves the AES electron susceptible for efficient scattering in the gas phase and attenuation of the signal above near-ambient pressure conditions. To study copper-based materials at higher pressures, e.g., the active state of a catalyst, Auger transitions providing electrons with higher kinetic energies are needed.

This study focuses on AES transitions involving the Cu K-shell (1s electrons) that exhibit discernible kinetic energy shifts between the oxidation states of Cu. It is shown that the AES Cu KL2M4,5 transition, with kinetic energy of ∼7936 eV, provides a large enough kinetic energy shift between metallic copper and Cu2O. AES signal is demonstrated in an ambient of 150 mbar CO2.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
在高压电子能谱中利用奥杰跃迁确定铜的氧化态
由于 X 射线光电子能谱 (XPS) 中的铜核级不能提供足够大的结合能位移,因此在电子能谱中准确区分金属铜 (Cu0) 和氧化亚铜 (Cu2O, Cu+)通常依赖于奥杰电子能谱 (AES) 中的 Cu L3M4,5M4,5 转变。AES Cu L3M4,5M4,5 电子的动能为 ∼917 eV,这使得 AES 电子容易在气相中发生有效散射,在近环境压力条件下信号会衰减。为了在更高压力下研究铜基材料,例如催化剂的活性状态,需要奥杰跃迁提供动能更高的电子。本研究重点关注涉及铜 K 壳(1s 电子)的 AES 跃迁,这些电子在铜的氧化态之间表现出明显的动能转移。研究表明,动能为 ∼7936 eV 的 AES Cu KL2M4,5 转变在金属铜和 Cu2O 之间提供了足够大的动能转移。AES 信号在 150 毫巴二氧化碳环境中得到了证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Surface Science
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.
期刊最新文献
VS2/graphene heterostructures as cathode materials for sodium-sulfur batteries: A first-principles study Effect of alloying elements (Ti, Zn, Zr, Al) on the interfacial properties of Cu/Ni2Si: A DFT study Editorial Board Adsorbate-induced effects on the H− ion collisions with Na/Ag(111) and K/Ag(111) surfaces One century of evolution of surface science, a personal perspective
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1