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

Journal Article · Tue Apr 15 04:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4870795· OSTI ID:22254924

Glans, Per-Anders; Pepper, John; Liu, Yi-Sheng; Du, Chun; Wang, Dunwei ^[1]

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1. Department of Chemistry, Boston College, Boston, Massachusetts 02467 (United States)

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.

• OSTI ID: 22254924
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 85; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

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