Hydrogen adsorption in nitrogen enriched ordered mesoporous carbons doped with nickel nanoparticles
Identifieur interne : 006A30 ( Main/Exploration ); précédent : 006A29; suivant : 006A31Hydrogen adsorption in nitrogen enriched ordered mesoporous carbons doped with nickel nanoparticles
Auteurs : Sylvain Giraudet [France] ; ZHONGHUA ZHU [Australie]Source :
- Carbon : (New York, NY) [ 0008-6223 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Hydrogène, Adsorption, Azote, Mésoporosité, Matériau poreux, Carbone, Nickel, Nanoparticule, Stockage, Caractérisation, Diffraction RX, Isotherme adsorption, Thermogravimétrie, Groupe fonctionnel, Support, Dimension particule, Haute pression, Capacité adsorption, Electrolyse, Eau, Diffusion, Adsorbant, Dopage, 8105U.
- Wicri :
English descriptors
- KwdEn :
Abstract
Ordered mesoporous carbons were enriched with nitrogen, then loaded with nickel nanoparticles and the effects on hydrogen storage were investigated. Firstly, a comparative characterization was carried out using transmission electronic microscopy, X-ray diffraction, nitrogen adsorption isotherm and thermogravimetric analysis. It was shown that the nickel was interacting with the nitrogen functional groups on the surface of the carbon support and even led to the formation of particles of different sizes. Secondly, hydrogen storage was studied. Hydrogen adsorption by volumetric method at 77, 298 and 373 K and high pressures (3 MPa) exhibited two distinct behaviors. At 77 K, the textural properties are critical and the adsorption capacities decreased with the nickel loading. On the contrary, at ambient and higher temperatures, the contribution of nickel nanoparticles was positive and marked by increased amounts of hydrogen reversibly adsorbed. Furthermore, the electrosorption of hydrogen was examined. It consists of the electrolysis of water that causes the formation and the diffusion of hydrogen on the adsorbent surface. In that particular application, the combination of nickel doping and nitrogen enrichment was detrimental to the adsorption capacities. However, nickel doped on pure carbons enhanced the amount of hydrogen electrosorbed.
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Y.)</title><idno type="ISSN">0008-6223</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Carbon : (New York, NY)</title><title level="j" type="abbreviated">Carbon : (N. Y.)</title><idno type="ISSN">0008-6223</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adsorbents</term><term>Adsorption</term><term>Adsorption capacity</term><term>Adsorption isotherms</term><term>Carbon</term><term>Characterization</term><term>Doping</term><term>Electrolysis</term><term>Functional group</term><term>High pressure</term><term>Hydrogen</term><term>Mesoporosity</term><term>Nanoparticles</term><term>Nickel</term><term>Nitrogen</term><term>Particle size</term><term>Porous materials</term><term>Scattering</term><term>Storage</term><term>Supports</term><term>Thermogravimetry</term><term>Water</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Hydrogène</term><term>Adsorption</term><term>Azote</term><term>Mésoporosité</term><term>Matériau poreux</term><term>Carbone</term><term>Nickel</term><term>Nanoparticule</term><term>Stockage</term><term>Caractérisation</term><term>Diffraction RX</term><term>Isotherme adsorption</term><term>Thermogravimétrie</term><term>Groupe fonctionnel</term><term>Support</term><term>Dimension particule</term><term>Haute pression</term><term>Capacité adsorption</term><term>Electrolyse</term><term>Eau</term><term>Diffusion</term><term>Adsorbant</term><term>Dopage</term><term>8105U</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Hydrogène</term><term>Azote</term><term>Carbone</term><term>Nickel</term><term>Stockage</term><term>Eau</term><term>Dopage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Ordered mesoporous carbons were enriched with nitrogen, then loaded with nickel nanoparticles and the effects on hydrogen storage were investigated. Firstly, a comparative characterization was carried out using transmission electronic microscopy, X-ray diffraction, nitrogen adsorption isotherm and thermogravimetric analysis. It was shown that the nickel was interacting with the nitrogen functional groups on the surface of the carbon support and even led to the formation of particles of different sizes. Secondly, hydrogen storage was studied. Hydrogen adsorption by volumetric method at 77, 298 and 373 K and high pressures (3 MPa) exhibited two distinct behaviors. At 77 K, the textural properties are critical and the adsorption capacities decreased with the nickel loading. On the contrary, at ambient and higher temperatures, the contribution of nickel nanoparticles was positive and marked by increased amounts of hydrogen reversibly adsorbed. Furthermore, the electrosorption of hydrogen was examined. It consists of the electrolysis of water that causes the formation and the diffusion of hydrogen on the adsorbent surface. In that particular application, the combination of nickel doping and nitrogen enrichment was detrimental to the adsorption capacities. However, nickel doped on pure carbons enhanced the amount of hydrogen electrosorbed.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Région Bretagne</li></region><settlement><li>Rennes</li></settlement></list><tree><country name="France"><region name="Région Bretagne"><name sortKey="Giraudet, Sylvain" sort="Giraudet, Sylvain" uniqKey="Giraudet S" first="Sylvain" last="Giraudet">Sylvain Giraudet</name></region><name sortKey="Giraudet, Sylvain" sort="Giraudet, Sylvain" uniqKey="Giraudet S" first="Sylvain" last="Giraudet">Sylvain Giraudet</name></country><country name="Australie"><noRegion><name sortKey="Zhonghua Zhu" sort="Zhonghua Zhu" uniqKey="Zhonghua Zhu" last="Zhonghua Zhu">ZHONGHUA ZHU</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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