Advanced

Pump-Flow-Probe X-ray Absorption Spectroscopy as a Tool for Studying Intermediate States of Photocatalytic Systems

Smolentsev, Grigory LU ; Guda, Alexander ; Zhang, Xiaoyi ; Haldrup, Kristoffer ; Andreiadis, Eugen S. ; Chayarot-Kerlidou, Murielle ; Canton, Sophie LU ; Nachtegaal, Maarten ; Artero, Vincent and Sundström, Villy LU (2013) In Journal of Physical Chemistry C 117(34). p.17367-17375
Abstract
A new setup for pump-flow-probe X-ray absorption spectroscopy has been implemented at the SuperXAS beamline of the Swiss Light Source. It allows recording X-ray absorption spectra with a time resolution of tens of microseconds and high detection efficiency for samples with sub-millimolar concentrations. A continuous wave laser is used for the photoexcitation, with the distance between laser and X-ray beams and velocity of liquid flow determining the time delay, while the focusing of both beams and the flow speed profile define the time resolution. This method is compared with the alternative measurement technique that utilizes a 1 kHz repetition rate laser and multiple X-ray probe pulses. Such an experiment was performed at beamline 11ID-D... (More)
A new setup for pump-flow-probe X-ray absorption spectroscopy has been implemented at the SuperXAS beamline of the Swiss Light Source. It allows recording X-ray absorption spectra with a time resolution of tens of microseconds and high detection efficiency for samples with sub-millimolar concentrations. A continuous wave laser is used for the photoexcitation, with the distance between laser and X-ray beams and velocity of liquid flow determining the time delay, while the focusing of both beams and the flow speed profile define the time resolution. This method is compared with the alternative measurement technique that utilizes a 1 kHz repetition rate laser and multiple X-ray probe pulses. Such an experiment was performed at beamline 11ID-D of the Advanced Photon Source. Advantages, limitations, and potential for improvement of the pump-flow-probe setup are discussed by analyzing the photon statistics. Both methods with Co K-edge probing were applied to the investigation of a cobaloxime-based photocatalytic reaction. The interplay between optimizing for efficient photoexcitation and time resolution as well and the effect of sample degradation for these two setups are discussed. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
117
issue
34
pages
17367 - 17375
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000323917300001
  • pmid:24443663
  • scopus:84883321788
  • pmid:24443663
ISSN
1932-7447
DOI
10.1021/jp4010554
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)
id
577bbaad-4317-4a9f-af19-940f78963b4f (old id 4106677)
date added to LUP
2016-04-01 10:22:26
date last changed
2020-08-19 01:46:58
@article{577bbaad-4317-4a9f-af19-940f78963b4f,
  abstract     = {A new setup for pump-flow-probe X-ray absorption spectroscopy has been implemented at the SuperXAS beamline of the Swiss Light Source. It allows recording X-ray absorption spectra with a time resolution of tens of microseconds and high detection efficiency for samples with sub-millimolar concentrations. A continuous wave laser is used for the photoexcitation, with the distance between laser and X-ray beams and velocity of liquid flow determining the time delay, while the focusing of both beams and the flow speed profile define the time resolution. This method is compared with the alternative measurement technique that utilizes a 1 kHz repetition rate laser and multiple X-ray probe pulses. Such an experiment was performed at beamline 11ID-D of the Advanced Photon Source. Advantages, limitations, and potential for improvement of the pump-flow-probe setup are discussed by analyzing the photon statistics. Both methods with Co K-edge probing were applied to the investigation of a cobaloxime-based photocatalytic reaction. The interplay between optimizing for efficient photoexcitation and time resolution as well and the effect of sample degradation for these two setups are discussed.},
  author       = {Smolentsev, Grigory and Guda, Alexander and Zhang, Xiaoyi and Haldrup, Kristoffer and Andreiadis, Eugen S. and Chayarot-Kerlidou, Murielle and Canton, Sophie and Nachtegaal, Maarten and Artero, Vincent and Sundström, Villy},
  issn         = {1932-7447},
  language     = {eng},
  number       = {34},
  pages        = {17367--17375},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Journal of Physical Chemistry C},
  title        = {Pump-Flow-Probe X-ray Absorption Spectroscopy as a Tool for Studying Intermediate States of Photocatalytic Systems},
  url          = {http://dx.doi.org/10.1021/jp4010554},
  doi          = {10.1021/jp4010554},
  volume       = {117},
  year         = {2013},
}