Ordered Mesoporous Carbons Enriched with Nitrogen: Application to Hydrogen Storage

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Title Ordered Mesoporous Carbons Enriched with Nitrogen: Application to Hydrogen Storage
Author Giraudet, Sylvain; Zhu, Zhonghua; Yao, Xiangdong; Lu, Gaoqing
Journal Name The Journal of Physical Chemistry C: Nanomaterials and Interfaces
Year Published 2010
Place of publication United States
Publisher American Chemical Society
Abstract Nitrogen functional groups were incorporated in ordered mesoporous carbons, and their influence on hydrogen storage was investigated. Two experimental methods were used to dope nitrogen atoms onto and/or into the organic adsorbent. First, a surface treatment using ammonia enabled doping up to 3.9 mass % of nitrogen while preserving a high surface area above 1300 m(2).g(-1). Second, carbon nitrides were synthesized using the hard template method and the reaction of carbon tetrachloride and ethylenediamine. In the latter instance, high contents, around 20 mass %, of nitrogen were obtained whereas the specific surface areas reached 630 m(2).g(-1). These materials were fully characterized by nitrogen and carbon dioxide adsorption, X-ray diffraction, X- ray photoelectron spectroscopy, and temperature-programmed desorption. Hydrogen storage in nitrogen-enriched mesoporous carbons was then studied. On one hand, physical adsorption under a wide panel of conditions (temperature, from 77 to 373 K, and pressure) shows that the texture of the adsorbent dominates the storage capability. On the other hand, electrochemical hydrogen storage enables one to store more than 0.5 wt % of hydrogen at ambient pressure and temperature. The nitrogen surface groups are involved in the electrochemical adsorption process, and an irreversible oxidation of these groups may prevent further hydrogen storage.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1021/jp101119r
Copyright Statement Self-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the author[s] for more information.
Volume 114
Issue Number 18
Page from 8639
Page to 8645
ISSN 1932-7447
Date Accessioned 2010-11-04
Language en_AU
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Sciences; Physical Chemistry of Materials; Solid State Chemistry
URI http://hdl.handle.net/10072/37522
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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