Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO2-Containing Perchloric Acid Solutions

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Title: Surface Acid–Base Properties of Anion-Adsorbed Species at Pt(111) Electrode Surfaces in Contact with CO2-Containing Perchloric Acid Solutions
Authors: Martínez-Hincapié, Ricardo | Berná Galiano, Antonio | Rodes García, Antonio | Climent, Victor | Feliu, Juan M.
Research Group/s: Electroquímica de Superficies
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Carbonate and bicarbonate adsorption | Pt(111) electrodes | CO2-saturated acidic solutions
Knowledge Area: Química Física
Issue Date: 15-Mar-2016
Publisher: American Chemical Society
Citation: The Journal of Physical Chemistry C. 2016, 120(29): 16191-16199. doi:10.1021/acs.jpcc.6b00589
Abstract: Carbonate and bicarbonate adsorption on Pt(111) electrodes from CO2-saturated acidic solutions is investigated by cyclic voltammetry and Fourier transform infrared reflection absorption spectroscopy (FT-IRRAS). Spectroscopic results show carbonate and bicarbonate adsorption even at pH = 1, where bulk concentration of these anions is negligible. Moreover, analysis of the potential dependence of band intensities corresponding to adsorbed carbonate and bicarbonate reveals an effect of the electrode potential on the surface acid–base equilibrium. In this regard, increasing potentials favor bicarbonate deprotonation, leading to carbonate formation. A tentative thermodynamic analysis is given to rationalize these trends.
Sponsor: Support from MINECO (Spain) through project CTQ2013-44083-P is greatly acknowledged. RMH thankfully acknowledges support from Generalitat Valenciana under the Santiago Grisolía Program (GRISOLIA/2013/008).
URI: http://hdl.handle.net/10045/62674
ISSN: 1932-7447 (Print) | 1932-7455 (Online)
DOI: 10.1021/acs.jpcc.6b00589
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2016 American Chemical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/acs.jpcc.6b00589
Appears in Collections:INV - EQSUP - Artículos de Revistas

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