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  www.dicp.cas.cn    发布时间:2017-06-13    供稿部门:502组
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报告题目:Reactions on transition metal oxide surfaces studied by high-resolution STM

报告时间:2017年6月15日,星期四,10:30-11:30

报告地点:催化楼三楼会议室

报告人:Stefan Wendt

Interdisciplinary Nanoscience Center (iNANO), Aarhus University

  报告摘要:

  In this seminar I will summarize surface science studies addressing selected prototypical model oxide systems. In all examples STM is the main technique, but combinations with TPD, XPS and DFT calculationswere very fruitful. In the first part, I will present examples found on the rutile TiO2(110)-(1x1) surface. The identification of point defects on the terraces such as oxygen vacancies and hydroxyl groups is discussed, andexamplesfor reactions of water and ethanol molecules with oxygen vacancies and step edges will be presented. In addition, I will address thecomplex O2-TiO2(110) interaction and the photo-reaction of ethanol on differently prepared TiO2(110) surfaces. In the second part, I will present atomically resolved STM images of sub-monolayer vanadium(V) on anataseTiO2(101). Following V deposition at liquid nitrogen temperature, the surface is covered with small isolated V clusters.However, embedding of V into the surface was found upon warming the sample to room temperature. The newly appeared features were assigned to monomeric V at regular Ti surface sites. Finally, I will address the structure of ultrathin FeO islands grown on Pt(111), with the focus on the edges of the FeO islands. Compared to my talk at the 2nd ICASS conference I will go more into detail particularly regarding the O2-TiO2(110) interaction.

  联系人:石瑛

  联系电话:84379128

 

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