Performance of a fuel cell optimized for in situX-ray absorption experiments.
A commercial fuel cell has been successfully modified to carry out X-ray absorption spectroscopy (XAS) measurements under optimized in operando conditions. The design is conceived for the performance of XAS experiments in transmission mode over a wide range of X-ray energies above 6 keV, owing to the reduced absorption of the cell. The wide angular aperture allows the collection of XAS in fluorescence mode and of X-ray diffraction patterns when needed. Details of the design of the cell and its performances are given. The quality of the extended X-ray absorption fine-structure spectra under working conditions has been verified at the ESRF and ELETTRA synchrotron radiation facilities, showing that relatively fast and low-noise transmission measurements on electrodes over a wide range of catalyst concentrations and energies are feasible.
Principi
Emiliano
E
CNISM, CNR-INFM CRS SOFT, Dipartimento di Fisica, Università di Camerino, I-62032 Camerino (MC), Italy. emiliano.principi@unicam.it
Di Cicco
Andrea
A
Witkowska
Agnieszka
A
Marassi
Roberto
R
D011211:Electric Power Supplies; D004563:Electrochemistry / Q000295:instrumentation; D013052:Spectrometry, X-Ray Emission / Q000295:instrumentation*; D017356:Synchrotrons