Open AccessA quasi‐solid state electrochemical cell for in situ EXAFS measurements on biological samples
Author(s) -
Cognigni Andrea,
Ascone Isabella,
Zamponi Silvia,
Marassi Roberto
Publication year - 2001
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049500018124
Subject(s) - extended x ray absorption fine structure , in situ , electrochemistry , materials science , solid state , electrochemical cell , analytical chemistry (journal) , chemistry , electrode , physics , optics , environmental chemistry , absorption spectroscopy , organic chemistry
A new `quasi‐solid state' spectroelectrochemical cell for in situ XAS measurements is described and tested using microperoxidase as reference material. The cell substantially improves conventional thin layer cells used for solution XAS spectroelectrochemistry in terms of assembling time and, more important, equilibration of the redox system under study with the applied potential. Spectra can be, in fact, recorded simultaneously during a slow scan rate cyclic voltammetric scan thus permitting correlation of the spectra and the electrochemical curve. Other advantages are the possibility to use very small quantities of material also with second‐generation rings. With high intensity sources having focussed beams a further decrease of the specimen weight can be easily obtained and the acquisition time of spectra further reduced.