title: Electrochemical reactivity of urea at Pt(100) surface in 0.5 M H2SO4by AC impedance spectroscopy.
abstract: The present paper reports an alternate current impedance spectroscopic study on adsorption of urea (U) at Pt(100) single-crystal surface, examined in 0.5 M H2SO4supporting electrolyte. The resulted information provided confirmation of the role of electrosorption of urea on the Pt(100) plane through evaluation of the associated charge transfer resistance and capacitance parameters. Obtained impedance results were compared to those previously recorded for guanidinium cation (G+) under analogous experimental conditions, especially with respect to the so-calledion pairingmechanism, as originally proposed for the G+ion and bi(sulfate)/OH species, based on the voltammetric and in situ Fourier transform infrared spectroscopy results.
authors: Department of Chemistry, Faculty of Environmental Protection and Agriculture, University of Warmia and Mazury in Olsztyn, Plac Lodzki 4, 10-957 Olsztyn, Poland.
authors: Boguslaw
authors: B
authors: Pierozynski
keywords: Guanidinium cation (G+); Impedance spectroscopy; Pt(100) single crystal; Urea (U)