skip to main content

SciTech ConnectSciTech Connect

Title: An ultra-high vacuum electrochemical flow cell for in situ/operando soft X-ray spectroscopy study

An in situ flow electrochemical cell has been designed and fabricated to allow better seal under UHV chamber thus to achieve a good signal to noise ratio in fluorescence yield detection of X-ray absorption spectra for spectroelectrochemical study. The cell also stabilizes the thin silicon nitride membrane window in an effective manner so that the liquid cell remains intact during X-ray absorption experiments. With the improved design of the liquid cell, electrochemical experiments such as cyclic voltammetry have been performed for 10 cycles with a good stability of sample window. Also an operando electrochemical experiment during photoelectrochemistry has been performed on n-type hematite electrode deposited on silicon nitride window. The experiment allows us to observe the formation of two extra electronic transitions before pre edge of O K-edge spectra.
Authors:
; ; ; ;  [1] ; ;  [2]
  1. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  2. Department of Chemistry, Boston College, Boston, Massachusetts 02467 (United States)
Publication Date:
OSTI Identifier:
22254924
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION; DESIGN; DETECTION; ELECTROCHEMICAL CELLS; ELECTROCHEMISTRY; ELECTRODES; FLUORESCENCE; HEMATITE; SIGNAL-TO-NOISE RATIO; SILICON NITRIDES; SOFT X RADIATION; SPECTROSCOPY; VOLTAMETRY; X-RAY SPECTRA