Glycolate adsorption at gold and platinum electrodes: A theoretical and in situ spectroelectrochemical study

Electrooxidation of glycerol studied by combined in situ IR spectroscopy and online mass spectrometry under continuous flow conditions

“…Similar conclusions were reported for other carboxylic acids like glycolic acid [47,60,62]. The bridge bonded geometry of adsorbed glycolate is supported also by DFT calculations [64].…”

Study of the electro-oxidation of a recreational drug GHB (gamma hydroxybutyric acid) on a platinum catalyst-type electrode through chronoamperometry and spectro-electrochemistry

“…First, weak bands at 520 cm -1 and 1935 cm -1 can be observed and associated to the bridge CO, although a contribution of lineal CO also cannot be categorically rejected [21,22,25]. The CH stretching mode at 2841 cm -1 [26], and the OH stretching of the adsorbed water at 3149 and 3320 cm -1 (not shown in spectra of figure 5) [27] are also present.…”

“…Also, at 830 cm -1 , a band overlapping with that corresponding to the phosphate electrolyte is assigned to the deformation scissoring mode of the carboxylic group [28]. The weak bands in the range between 1000 and 1400 cm -1 present an important overlapping and correspond to the adsorption stretching band of C-OH, the bending bands of groups CH 2 and OH, and the symmetric stretching of OCO group [22]. It is necessary to emphasize the presence of absorbed CO despite the known fact that in phosphoric media the formation of CO ads from dissociative oxidation of alcohols and their further oxidation is strongly inhibited [14].…”

“…The CH stretching mode at 2841 cm -1 [26], and the OH stretching of the adsorbed water at 3149 and 3320 cm -1 (not shown in spectra of figure 5) [27] are also present. On the other hand a peak at 950 cm -1 is assigned to the symmetric stretching of C-C bond [22]. Also, at 830 cm -1 , a band overlapping with that corresponding to the phosphate electrolyte is assigned to the deformation scissoring mode of the carboxylic group [28].…”

“…Also, recent reports on the spectroelectrochemical response of alcohols by in-situ Raman (SERS) have been published describing the detection of intermediate fragments and species from the dissociative and non-dissociative electro-oxidation of alcohols [21,22].…”