Gonzalo García
Leiden University
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Publication
Featured researches published by Gonzalo García.
Journal of the American Chemical Society | 2010
Chantal Stoffelsma; Paramaconi Rodriguez; Gonzalo García; Nuria Garcia-Araez; Dusan Strmcnik; Nenad M. Markovic; Marc T. M. Koper
The role of alkali cations (Li(+), Na(+), K(+), Cs(+), and Be(2+)) on the blank voltammetric response and the oxidative stripping of carbon monoxide from stepped Pt single-crystal electrodes in alkaline media has been investigated by cyclic voltammetry. A strong influence of the nature of the cation on both the blank voltammetric profile and the CO oxidation is observed and related to the influence of the cation on the specific adsorption of OH on the platinum surface. Especially Li(+) and Be(2+) cations markedly affect the adsorption of OH and thereby have a significant promoting effect on CO(ads) oxidation. The voltammetric experiments suggest that, on Pt(111), the influence of Li(+) (and Be(2+)) is primarily through a weakening of the repulsive interactions between the OH in the OH adlayer, whereas in the presence of steps also, the onset of OH adsorption is at a lower potential, both on steps and on terraces.
Journal of the American Chemical Society | 2009
Gonzalo García; Marc T. M. Koper
The electrooxidation of adsorbed CO on a stepped platinum electrode in alkaline media reveals a dual role of the active step site in activating CO oxidation by adsorbed OH. The combination of interrupted chronoamperometry with cyclic voltammetry shows that there is active combination of CO and OH near or on the step site as well as a much less reactive combination of CO and OH in which the CO sits on the step and reacts with OH from the terrace.
Langmuir | 2009
Gonzalo García; Paramaconi Rodriguez; V. Rosca; Mtm Marc Koper
In this work we investigate the electro-oxidation of CO on Pt(111) in alkaline solution by using Fourier transform infrared spectroscopy (FTIRS), to determine the adsorption sites of the CO, the intermediate species and the final oxidation product as a function of the applied potential. Multiple CO vibration bands (on-top, bridge and 3-fold hollow site) are observed on the Pt(111) electrode, their distribution and potential dependence being strongly dependent on the surface treatment. Spectroscopic results show that the final reaction product is carbonate and suggest that adsorbed carbonate blocks the access of CO from the (111) terrace to the active sites (i.e., step and kink sites).
Physical Chemistry Chemical Physics | 2008
Gonzalo García; Marc T. M. Koper
Electrochimica Acta | 2010
Rubén Gisbert; Gonzalo García; Marc T. M. Koper
Physical Chemistry Chemical Physics | 2009
Gonzalo García; Marc T. M. Koper
Electrochimica Acta | 2011
Rubén Gisbert; Gonzalo García; Marc T. M. Koper
Electrocatalysis | 2011
Paramaconi Rodriguez; Gonzalo García; Enrique Herrero; Juan M. Feliu; Marc T. M. Koper
Surface Science | 2015
Gonzalo García; Chantal Stoffelsma; Paramaconi Rodriguez; Marc T. M. Koper
216th ECS Meeting | 2009
Gonzalo García; Paramaconi Rodriguez; Stefan Frank; Andrey A. Koverga; Marc Koper