{"title":"利用软 X 射线吸收光谱对 TiO2 光电催化中间产物进行实时和操作观察","authors":"Kaoruho Sakata , Kenta Amemiya","doi":"10.1016/j.elecom.2024.107771","DOIUrl":null,"url":null,"abstract":"<div><p>The oxygen evolution reaction (OER) on the TiO<sub>2</sub> surface at the solid–liquid interface was observed in real-time and <em>operando</em> using fluorescence-yield X-ray absorption spectroscopy (XAS) in the soft X-ray region. The OER was observed during a potential sweep with UV light on or off, focusing on the oxygen K-edge XAS. Although conventional XAS measurements require long measurement times, the spectra during the reaction were obtained every 3 s in the present experiment via wavelength-dispersive XAS technique. An increase in the X-ray absorption intensity at approximately 533.8 eV was observed during the potential sweep only with UV light on. The observed spectral change is discussed in relation to the reaction mechanism of the OER. The present technique can be applied to a wide range of analyses of (photo-) electrocatalysis and electrochemical reactions at solid–liquid interfaces to observe their products and intermediates during the reaction.</p></div>","PeriodicalId":304,"journal":{"name":"Electrochemistry Communications","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1388248124001140/pdfft?md5=acc3541465b7d73b364ebfccc7f4eb98&pid=1-s2.0-S1388248124001140-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Real-time and operando observation of intermediates on TiO2 photoelectrocatalysis by soft X-ray absorption spectroscopy\",\"authors\":\"Kaoruho Sakata , Kenta Amemiya\",\"doi\":\"10.1016/j.elecom.2024.107771\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The oxygen evolution reaction (OER) on the TiO<sub>2</sub> surface at the solid–liquid interface was observed in real-time and <em>operando</em> using fluorescence-yield X-ray absorption spectroscopy (XAS) in the soft X-ray region. The OER was observed during a potential sweep with UV light on or off, focusing on the oxygen K-edge XAS. Although conventional XAS measurements require long measurement times, the spectra during the reaction were obtained every 3 s in the present experiment via wavelength-dispersive XAS technique. An increase in the X-ray absorption intensity at approximately 533.8 eV was observed during the potential sweep only with UV light on. The observed spectral change is discussed in relation to the reaction mechanism of the OER. The present technique can be applied to a wide range of analyses of (photo-) electrocatalysis and electrochemical reactions at solid–liquid interfaces to observe their products and intermediates during the reaction.</p></div>\",\"PeriodicalId\":304,\"journal\":{\"name\":\"Electrochemistry Communications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2024-06-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1388248124001140/pdfft?md5=acc3541465b7d73b364ebfccc7f4eb98&pid=1-s2.0-S1388248124001140-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrochemistry Communications\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1388248124001140\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ELECTROCHEMISTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochemistry Communications","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1388248124001140","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 0
摘要
利用软 X 射线区域的荧光-产率 X 射线吸收光谱(XAS)实时观察了固液界面 TiO2 表面的氧进化反应(OER)。在紫外光开启或关闭的电位扫描过程中观察了 OER,重点是氧 K 边 XAS。虽然传统的 XAS 测量需要较长的测量时间,但在本实验中,通过波长色散 XAS 技术,每隔 3 秒就能获得反应过程中的光谱。在电位扫描过程中,只有在紫外光下才能观察到约 533.8 eV 处的 X 射线吸收强度增加。观察到的光谱变化与 OER 的反应机制有关。本技术可广泛应用于固液界面(光)电催化和电化学反应的分析,以观察反应过程中的产物和中间产物。
Real-time and operando observation of intermediates on TiO2 photoelectrocatalysis by soft X-ray absorption spectroscopy
The oxygen evolution reaction (OER) on the TiO2 surface at the solid–liquid interface was observed in real-time and operando using fluorescence-yield X-ray absorption spectroscopy (XAS) in the soft X-ray region. The OER was observed during a potential sweep with UV light on or off, focusing on the oxygen K-edge XAS. Although conventional XAS measurements require long measurement times, the spectra during the reaction were obtained every 3 s in the present experiment via wavelength-dispersive XAS technique. An increase in the X-ray absorption intensity at approximately 533.8 eV was observed during the potential sweep only with UV light on. The observed spectral change is discussed in relation to the reaction mechanism of the OER. The present technique can be applied to a wide range of analyses of (photo-) electrocatalysis and electrochemical reactions at solid–liquid interfaces to observe their products and intermediates during the reaction.
期刊介绍:
Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.