Detection of Intermediates and Products of Electrochemical Processes - A DEMS Study

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Authors

DRBÁLKOVÁ Eva JANDERKA Pavel

Year of publication 2001
Type Article in Proceedings
Conference Proceedings of IUPAC Internation Congress on Analytical Science 2001 (ICAS 2001)
MU Faculty or unit

Faculty of Science

Citation
Field Electrochemistry
Keywords DEMS electro-oxidation electro-reduction hydrocarbon
Description The presentation describes an on-line connection of electrochemical cell and mass spectrometer used for detection, identification and observation in time of volatile and semivolatile species during electrochemical polarisation of working electrode (DEMS - Differential Electrochemical Mass Spectrometry). DEMS is a type of experimental technique, which makes possible an investigation of electrosorption, electrooxidation and electrohydrogenation processes of molecules like aromatic hydrocarbons, some other small organic molecules and reaction intermediates. The experimental set-up consists of a mass spectrometer connected with an electrochemical cell separated by hydrophobic membrane. Standard three-electrode electrochemical arrangement is applied. As test system we studied the process of electrochemical hydrogenation of naphthalene and benzene and processes of electrochemical oxidation of formic acid and dimethylformamide in 0,5 M H2SO4 on polycrystalline Pt electrode.
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