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

被引：77

作者：

Bleda-Martinez, M. J. ^{[1
]}

Perez, J. M. ^{[2
]}

Linares-Solana, A. ^{[1
]}

Morallon, E. ^{[2
]}

Cazorla-Amoros, D. ^{[1
]}

机构：

[1] Univ Alicante, Dept Quim Inorgan, E-03080 Alicante, Spain

[2] Univ Alicante, Dept Quim Fis, E-03080 Alicante, Spain

来源：

CARBON | 2008年 / 46卷 / 07期

关键词：

D O I：

10.1016/j.carbon.2008.03.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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(sp(2))-H bonds during the cathodic process and its reversibility during the oxidation step. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1053 / 1059

页数：7

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