University of Illinois Urbana-Champaign

Monitoring Photoinduced And Photocatalytic Surface Reactions With Time, Mass, And Energy Resolution

Vaida, Mihai E.

Content Files
5766.pdf
RJ11_5766.pdf

Permalink

https://hdl.handle.net/2142/111555

Description

Title
Monitoring Photoinduced And Photocatalytic Surface Reactions With Time, Mass, And Energy Resolution
Author(s)
Vaida, Mihai E.
Issue Date
2021-06-24
Keyword(s)
Dynamics and kinetics
Date of Ingest
  • 2021-09-24T21:10:01Z
  • 2022-01-21T16:08:46Z
Abstract
Breaking and making of chemical bonds in molecules attached to a substrate constitute the elementary steps of a surface chemical reaction and occur on the ultrafast time scale of nuclear motion. Monitoring these elementary steps is crucial for a detailed understanding of the mechanism of surface photoinduced and photocatalytic reactions. In this work, an experimental methodology that combines surface mass spectrometry with femtosecond pump-probe technique and ultraviolet multiphoton or extreme ultraviolet single photon ionization is employed to decipher the mechanism of surface photoinduced and photocatalytic reactions. The technique relies on the detection of highly unstable intermediate species and final products with time-, mass-, and energy resolution. In the first part of the talk, the photoinduced reaction dynamics of methyl iodide adsorbed on an amorphous cerium oxide ultrathin film is investigated to understand the effect of a non-crystalline surface on the reaction dynamics. In the second part of the talk, the reaction dynamics that leads to the formation of methane and methanol from methyl iodide and water co-adsorbed on a TiO2(110) surface will be presented. The results presented here demonstrate the viability of the employed experimental methodology to decipher complex surface photoinduced and photocatalytic reaction mechanisms.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
Text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/111555
DOI
10.15278/isms.2021.RJ11

Owning Collections

Abstracts & Presentations - 2021 International Symposium on Molecular Spectroscopy PRIMARY