Effect of surface chemistry on electrochemical storage of hydrogen in porous carbon materials

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Title: Effect of surface chemistry on electrochemical storage of hydrogen in porous carbon materials
Authors: Bleda Martínez, María Jesús | Pérez Martínez, Juan Manuel | Linares-Solano, Angel | Morallon, Emilia | Cazorla-Amorós, Diego
Research Group/s: Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Hydrogen storage | Electrochemical methods | Porous carbon materials
Knowledge Area: Química Física
Date Created: May-2007
Issue Date: Jun-2008
Publisher: Elsevier
Citation: BLEDA MARTÍNEZ, María Jesús, et al. "Effect of surface chemistry on electrochemical storage of hydrogen in porous carbon materials". Carbon. Vol. 46, Issue 7 (June 2008). ISSN 0008-6223, pp. 1053-1059
Abstract: Porous carbon materials, with different porosities and surface chemistry have been prepared and characterized to obtain a better understanding of the mechanism of the electrochemical storage of hydrogen. The hydrogen storage capacity depends, not only on the porosity of the material, but also on the surface chemistry, which is a critical factor. The results show that the higher the amount of surface oxygen groups, the lower is the hydrogen uptake. Measurement of the number of active carbon sites shows the important role of the unsaturated carbon atoms in the process. In situ Raman spectroscopy has been used in order to further explore the structural changes in the carbon material during the charge–discharge processes. This technique has allowed us to observe the formation of the C(sp2)AH bonds during the cathodic process and its reversibility during the oxidation step.
Sponsor: MEC and FEDER for financial support (Project CTQ2006-08958/PPQ) and Ministerio de Fomento (70012/t05-fomento05 project).
URI: http://hdl.handle.net/10045/10517
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2008.03.016
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.carbon.2008.03.016
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